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| 1. |
The application of flow switching rotary valves in two‐dimensional high resolution gas chromatography |
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Journal of High Resolution Chromatography,
Volume 2,
Issue 2,
1979,
Page 55-62
Roger J. Miller,
S. D. Stearns,
R. R. Freeman,
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摘要:
AbstractTwo‐dimensional high resolution gas chromatography with small bore glass capillary columns is simplified by use of a single 6–port flow switching rotary valve. The band spreading and tailing normally associated with mechanical valves is overcome by matching the internal valve passage diameters to that of the capillary column, and by minimizing unswept volumes in the fittings. selection of inert valve and transfer line materials effectively ellminates undesirable adsorption phenomena. The high thermal stability of the value permmits it to be mounted directly in the GC oven where it can be actuated externally. With slight modifications either packed or capillary pre‐columns may be used for initial saperations. Application of enrichment, solvent removal and heart cutting are desc
ISSN:0935-6304
DOI:10.1002/jhrc.1240020202
出版商:Wiley Subscription Services, Inc., A Wiley Company
年代:1979
数据来源: WILEY
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| 2. |
Efficiency of composite vs. conically shaped chromatographic columns |
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Journal of High Resolution Chromatography,
Volume 2,
Issue 2,
1979,
Page 63-67
A. S. Said,
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摘要:
AbstractThe theory of composite chromatographic columns has been re‐examined and general equations relating their efficiency to those of individual columns were derived. The derivations were based on elementary principles without reference to the principle of variance additivity. Derived also, were general equations for the efficiency of columns with continuously varying diameters, HETP and other properties from which formulae for special cases of practical interest were deduced. An example comparing the efficiencies of two columns, one conical and the other composite was given. The calculations show clearly that the conical column is superior in efficiency for the same total length and total retention volum
ISSN:0935-6304
DOI:10.1002/jhrc.1240020203
出版商:Wiley Subscription Services, Inc., A Wiley Company
年代:1979
数据来源: WILEY
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| 3. |
Degradation of diluted solutions of silicone stationary phases during storage |
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Journal of High Resolution Chromatography,
Volume 2,
Issue 2,
1979,
Page 69-70
A. Venema,
L. G. J. v. d. Ven,
H. v. d. Steege,
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PDF (130KB)
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ISSN:0935-6304
DOI:10.1002/jhrc.1240020204
出版商:Wiley Subscription Services, Inc., A Wiley Company
年代:1979
数据来源: WILEY
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| 4. |
Error propagation in quantitative analyses |
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Journal of High Resolution Chromatography,
Volume 2,
Issue 2,
1979,
Page 70-71
J. Sevčik,
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PDF (143KB)
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ISSN:0935-6304
DOI:10.1002/jhrc.1240020205
出版商:Wiley Subscription Services, Inc., A Wiley Company
年代:1979
数据来源: WILEY
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| 5. |
Normal and reverse solvent effects in split injection |
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Journal of High Resolution Chromatography,
Volume 2,
Issue 2,
1979,
Page 72-73
Roger J. Miller,
Walter Jennings,
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PDF (155KB)
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ISSN:0935-6304
DOI:10.1002/jhrc.1240020206
出版商:Wiley Subscription Services, Inc., A Wiley Company
年代:1979
数据来源: WILEY
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| 6. |
HPLC separation of Fluocortolon and physiological corticoids |
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Journal of High Resolution Chromatography,
Volume 2,
Issue 2,
1979,
Page 74-74
W. Butte,
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PDF (78KB)
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ISSN:0935-6304
DOI:10.1002/jhrc.1240020207
出版商:Wiley Subscription Services, Inc., A Wiley Company
年代:1979
数据来源: WILEY
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| 7. |
Kovats indices of monoterpene hydrocarbons on glass capillary columns |
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Journal of High Resolution Chromatography,
Volume 2,
Issue 2,
1979,
Page 75-76
T. Saeed,
G. Redant,
P. Sandra,
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PDF (162KB)
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ISSN:0935-6304
DOI:10.1002/jhrc.1240020208
出版商:Wiley Subscription Services, Inc., A Wiley Company
年代:1979
数据来源: WILEY
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| 8. |
Versatile derivatization reactions with 4‐lodobutaneboronic and 2,4‐dichlorobenzeneboronic acids |
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Journal of High Resolution Chromatography,
Volume 2,
Issue 2,
1979,
Page 77-78
S. Singhawangcha,
C. F. Poole,
A. Zlatkis,
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PDF (186KB)
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ISSN:0935-6304
DOI:10.1002/jhrc.1240020209
出版商:Wiley Subscription Services, Inc., A Wiley Company
年代:1979
数据来源: WILEY
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| 9. |
The use of chemically bonded stationary phases in HPTLC |
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Journal of High Resolution Chromatography,
Volume 2,
Issue 2,
1979,
Page 79-81
U. A. Th. Brinkman,
G. De Vries,
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PDF (258KB)
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ISSN:0935-6304
DOI:10.1002/jhrc.1240020210
出版商:Wiley Subscription Services, Inc., A Wiley Company
年代:1979
数据来源: WILEY
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| 10. |
A simple, rapid method for the estimation of naproxen and 6‐desmethyl naproxen in plasma and urine |
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Journal of High Resolution Chromatography,
Volume 2,
Issue 2,
1979,
Page 82-84
S. H. Dromgoole,
D. E. Furst,
H. E. Paulus,
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PDF (234KB)
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ISSN:0935-6304
DOI:10.1002/jhrc.1240020211
出版商:Wiley Subscription Services, Inc., A Wiley Company
年代:1979
数据来源: WILEY
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