Application of gas-liquid chromatography to the analysis of essential oils. Part VIII. Fingerprinting of essential oils by temperature-programmed gas-liquid chromatography using methyl silicone stationary phases

The Analyst ◽  
1981 ◽  
Vol 106 (1261) ◽  
pp. 448 ◽  
Keyword(s):  
Liquid Chromatography ◽  
Essential Oils ◽  
Stationary Phases ◽  
Gas Liquid Chromatography ◽  
Methyl Silicone ◽  
Temperature Programmed

Simultaneous Determination of Urinary Estriol, Pregnanediol, and Pregnanolone by Gas-Liquid Chromatography

1969 ◽  
Vol 15 (3) ◽  
pp. 190-196 ◽  
Author(s):  
Robert D Baynton ◽  
Donald J Campbell
Keyword(s):  
Liquid Chromatography ◽  
Glycol Succinate ◽  
Urine Specimen ◽  
Gas Liquid Chromatography ◽  
Large Hospital ◽  
Flame Ionization ◽  
Trimethylsilyl Ethers ◽  
Hydrogen Flame ◽  
Progesterone Metabolites ◽  
Temperature Programmed

Abstract A simplified method for following the urinary excretion of estriol, pregnanediol, and pregnanolone during the course of pregnancy is presented. The procedure has been used successfully in a large hospital laboratory. An important advantage is that the estrogen and progesterone metabolites are measured simultaneously, and separate extraction and gas-liquid chromatography is not required. The urine specimen is hydrolyzed enzymatically, extracted, and the steroids are converted to trimethylsilyl ethers. Temperature-programmed gas-liquid chromatography is carried out on a 2% neopentyl glycol succinate column using a hydrogen flame ionization detector.

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