Gas chromatography of free fatty acid

Analysis of fatty acid composition of Withania coagulans fruits by gas chromatography/mass spectrometry

Background and objectives: Withania coagulans Dunal (Solanaceae) fruits are recommended to treat asthma, dyspepsia, biliousness, flatulent colic, liver complaints, intestinal infections, strangury, wounds and as diuretic, emetic and sedative agent in Indian traditional system of medicine. The objective of this study was to describe the systematic fatty acid composition...

Free Fatty Acid Profiling of Metabolic Syndrome Blood Serum by Gas Chromatography-Mass Spectrometry

Preparation of fatty acid methyl esters for gas-liquid chromatography.

A convenient method using commercial aqueous concentrated HCl (conc. HCl; 35%, w/w) as an acid catalyst was developed for preparation of fatty acid methyl esters (FAMEs) from sterol esters, triacylglycerols, phospholipids, and FFAs for gas-liquid chromatography (GC). An 8% (w/v) solution of HCl in methanol/water (85:15, v/v) was prepared by diluting 9.7 ml of conc. HCl with 41.5 ml of methanol....

Determining the fatty acid composition in plasma and tissues as fatty acid methyl esters by gas chromatography

Gas-liquid chromatography of hyocholic acid.

Partial derivatives of hyocholic acid were formed under the usual conditions for trifluoroacetylation of bile acids (trifluoroacetic anhydride, 35 degrees C for 20 min). Complete trifluoroacetylation of hyocholic acid was achieved at 80 degrees C for 30 min, or at 60 degrees C for 30 min when a trace of pyridine was added to the reaction mixture.