CONCURRENT ANALYSIS OF VITAMIN A AND VITAMIN E BY REVERSED PHASE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY

1979 ◽  
pp. 477-497 ◽  
Author(s):  
Jonathan W. DeVries ◽  
David C. Egberg ◽  
John C. Heroff
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Vitamin E ◽  
Vitamin A ◽  
High Performance ◽  
Reversed Phase ◽  
Concurrent Analysis

Rapid determination of vitamin E in vegetable oils by reversed-phase high-performance liquid chromatography

2000 ◽  
Vol 881 (1-2) ◽  
pp. 251-254 ◽  
Author(s):  
E Gimeno ◽  
A.I Castellote ◽  
R.M Lamuela-Raventós ◽  
M.C de la Torre ◽  
M.C López-Sabater
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Vitamin E ◽  
Vegetable Oils ◽  
High Performance ◽  
Rapid Determination ◽  
Reversed Phase

Analysis for diazepam and nordiazepam by electron-capture gas chromatography and by liquid chromatography.

1979 ◽  
Vol 25 (7) ◽  
pp. 1296-1300 ◽  
Author(s):  
J E Wallace ◽  
H A Schwertner ◽  
E L Shimek
Keyword(s):  
Gas Chromatography ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Electron Capture ◽  
Chromatographic Analysis ◽  
High Performance ◽  
Reversed Phase ◽  
Gas Liquid Chromatography ◽  
Stationary Liquid Phase ◽  
Concurrent Analysis

Abstract We describe the use of electron-capture gas chromatography or reversed-phase "high-performance" liquid chromatography for concurrent analysis for diazepam and nordiazepam in serum. In the gas-chromatographic analysis our use of a new chemically deactivated stationary liquid phase, SP 2250-DB (Supelco, Inc.), resulted in improved chromatographic sensitivity and peak symmetry for the two benzodiazepines as compared to that obtained with either OV-17or OV-1 phases. Steady-state concentrations of diazepam and nordiazepam in serum as determined by gas-liquid chromatography correlated closely with those found by liquid-liquid chromatography.

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