|
1. |
Physiological standardisation |
|
Analyst,
Volume 48,
Issue 568,
1923,
Page 303-314
J. Stanley White,
Preview
|
PDF (905KB)
|
|
摘要:
ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C.of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem.Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ...... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C.of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w.P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust.The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ...... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C.basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C.of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene.w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins .. . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust.The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W.P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C.basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C.of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene.w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust.The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.
ISSN:0003-2654
DOI:10.1039/AN9234800303
出版商:RSC
年代:1923
数据来源: RSC
|
2. |
Presence of barium and strontium in natural brines |
|
Analyst,
Volume 48,
Issue 568,
1923,
Page 315-320
A. G. Francis,
Preview
|
PDF (469KB)
|
|
摘要:
ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C.of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem.Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ...... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C.of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w.P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust.The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.
ISSN:0003-2654
DOI:10.1039/AN9234800315
出版商:RSC
年代:1923
数据来源: RSC
|
3. |
Titanium in Nile silt |
|
Analyst,
Volume 48,
Issue 568,
1923,
Page 320-321
E. Griffiths-Jones,
Preview
|
PDF (111KB)
|
|
摘要:
ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.
ISSN:0003-2654
DOI:10.1039/AN9234800320
出版商:RSC
年代:1923
数据来源: RSC
|
4. |
Note. A gallotannin apparently free from glucose |
|
Analyst,
Volume 48,
Issue 568,
1923,
Page 321-322
M. Nierenstein,
Preview
|
PDF (97KB)
|
|
摘要:
ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.
ISSN:0003-2654
DOI:10.1039/AN9234800321
出版商:RSC
年代:1923
数据来源: RSC
|
5. |
Notes from the Reports of Public Analysts |
|
Analyst,
Volume 48,
Issue 568,
1923,
Page 322-324
J. F. Liverseege,
Preview
|
PDF (169KB)
|
|
摘要:
ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C.of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem.Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.
ISSN:0003-2654
DOI:10.1039/AN9234800322
出版商:RSC
年代:1923
数据来源: RSC
|
6. |
Legal notes |
|
Analyst,
Volume 48,
Issue 568,
1923,
Page 324-327
Preview
|
PDF (331KB)
|
|
摘要:
ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C.of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem.Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ...... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.
ISSN:0003-2654
DOI:10.1039/AN9234800324
出版商:RSC
年代:1923
数据来源: RSC
|
7. |
Grass sickness in horses |
|
Analyst,
Volume 48,
Issue 568,
1923,
Page 327-330
Preview
|
PDF (266KB)
|
|
摘要:
ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C.of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem.Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ...... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.
ISSN:0003-2654
DOI:10.1039/AN923480327b
出版商:RSC
年代:1923
数据来源: RSC
|
8. |
Ministry of Health |
|
Analyst,
Volume 48,
Issue 568,
1923,
Page 330-331
Preview
|
PDF (137KB)
|
|
摘要:
ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.
ISSN:0003-2654
DOI:10.1039/AN923480330b
出版商:RSC
年代:1923
数据来源: RSC
|
9. |
Food and drugs analysis |
|
Analyst,
Volume 48,
Issue 568,
1923,
Page 331-334
Preview
|
PDF (253KB)
|
|
摘要:
ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C.of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem.Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ...... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.
ISSN:0003-2654
DOI:10.1039/AN9234800331
出版商:RSC
年代:1923
数据来源: RSC
|
10. |
Biochemical, bacteriological, etc. |
|
Analyst,
Volume 48,
Issue 568,
1923,
Page 334-344
Preview
|
PDF (847KB)
|
|
摘要:
ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C.of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem.Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ...... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C.of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w.P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust.The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ...... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood.The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent.of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C.basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C.of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene.w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins .. . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust. The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather.The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C.of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed.The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed.The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.ORGANIC ANALYSIS 325 Soluble d i d s ... ... ... Non-thmins . . . ... Tannin ... ... . . I I - 1--- Percent. I Per Cent. Per Cent. 2.76 4-77 25-7 1-89 3.63 13.5 0.86 1-15 12.2 Heartwood. The only part of the wood which 4as any possible value as a souroe of tannin is the heartwood; the chief available raw material would be the sawdust.The tannin imparts a dark purplish-brown colour to the outside of hides, but the leather produced might be satisfaotory as a heavy sole leather. The liquor which oolIects an steam-kilning the wood contains from 7 to 10 per cent. of tannin. W. P. S. Estimation of Thiophene. P. E. Spielmann and S. P. Schotz. (J. Soc. Chem. Id., 1919,38,188-189T.)-The authors have examined various met-hods whioh have been suggested for the estimation of thiophene in benzene, and recommend the following modifioations of the basic mercuric sulphate and acetate methods : Basic Mercu/l.ic Szi,&hate Method.-Two C.C. of the benzene and 20 C.C. basic mercuric sulphate solution (sulphuric acid 20 c.c., water 100 ox., and mercuric oxide 5 grms.) axe shaken in a closed tube for three hours; the white precipitate which is formed is collected, washed with hot water, dried at 110" C., and weighed. The weight multiplied by 0.0757 gives the amount of thiophene in 2 C.C. of benzene. Basic Mercuric Acetate Method.---Ten O.C. of the benzene and 4 grms. of baaic mercuric aaetafe (mercuric oxide, 1 part, glacial aceti0 said, 2 parts, the mixture b~iing filtered and the salt washed with ether) are heated on a water-bath under a, reflux condenser for fifteen minutes ; after cooling, the precipitate i8 collected, washed with water, dried at 100" C., and weighed. The weight is multiplied by 0.07516 to obtain the oorresponding amount of thiophene. w. P. s.
ISSN:0003-2654
DOI:10.1039/AN9234800334
出版商:RSC
年代:1923
数据来源: RSC
|
|