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Obituary notices |
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Analyst,
Volume 46,
Issue 542,
1921,
Page 175-178
Bernard Dyer,
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PDF (227KB)
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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/AN921460175b
出版商:RSC
年代:1921
数据来源: RSC
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Liquid extract of red squill (Scilla Maritima) as a rat poison |
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Analyst,
Volume 46,
Issue 542,
1921,
Page 178-180
F. W. Smith,
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PDF (161KB)
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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/AN9214600178
出版商:RSC
年代:1921
数据来源: RSC
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| 3. |
Apparatus for the routine determination of melting-points of fats and fatty acids |
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Analyst,
Volume 46,
Issue 542,
1921,
Page 180-182
S. H. Blichfeldt,
Preview
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PDF (123KB)
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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/AN9214600180
出版商:RSC
年代:1921
数据来源: RSC
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The detection of adulteration in butter by means of the melting-point of the insoluble volatile acids |
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Analyst,
Volume 46,
Issue 542,
1921,
Page 183-187
George Van B. Gilmour,
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PDF (286KB)
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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.
ISSN:0003-2654
DOI:10.1039/AN9214600183
出版商:RSC
年代:1921
数据来源: RSC
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| 5. |
The estimation of strychnine in scale preparations containing quinine and other cinchona alkaloids |
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Analyst,
Volume 46,
Issue 542,
1921,
Page 188-193
T. F. Harvey,
Preview
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PDF (352KB)
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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/AN9214600188
出版商:RSC
年代:1921
数据来源: RSC
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| 6. |
A colour reaction for aconite |
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Analyst,
Volume 46,
Issue 542,
1921,
Page 193-194
S. Mallanneh,
Preview
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PDF (82KB)
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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/AN9214600193
出版商:RSC
年代:1921
数据来源: RSC
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| 7. |
A method for the determination of the acidity of coloured solutions |
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Analyst,
Volume 46,
Issue 542,
1921,
Page 194-195
J. L. Lizius,
Preview
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PDF (89KB)
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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/AN9214600194
出版商:RSC
年代:1921
数据来源: RSC
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| 8. |
Food and drugs analysis |
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Analyst,
Volume 46,
Issue 542,
1921,
Page 195-201
Preview
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PDF (505KB)
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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.
ISSN:0003-2654
DOI:10.1039/AN9214600195
出版商:RSC
年代:1921
数据来源: RSC
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| 9. |
Bacteriological, physiological, etc. |
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Analyst,
Volume 46,
Issue 542,
1921,
Page 201-205
Preview
|
PDF (281KB)
|
|
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.
ISSN:0003-2654
DOI:10.1039/AN9214600201
出版商:RSC
年代:1921
数据来源: RSC
|
| 10. |
Organic analysis |
| |
Analyst,
Volume 46,
Issue 542,
1921,
Page 205-211
Preview
|
PDF (414KB)
|
|
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.
ISSN:0003-2654
DOI:10.1039/AN921460205b
出版商:RSC
年代:1921
数据来源: RSC
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