University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Food -> cream

Citations 1

"Determination Of Free Fatty Acids In Dairy Products By Direct Coupling Of A Continuous Preconcentration Ion-exchange-derivatization Module To A Gas Chromatograph"
Anal. Chem. 1994 Volume 66, Issue 5 Pages 628-634
Evaristo Ballesteros, Soledad Cardenas, Mercedes Gallego, and Miguel Valcarcel

Abstract: A flow injection ion-exchange system coupled to a gas-liquid chromatograph was used for the determination of free fatty acids in dairy products. The pretreatment module permits isolation and pre-concentration of free fatty acids on Amberlite IRA-400 and derivatization of eluted acids with acetyl chloride in methanol. The methyl esters are continuously injected via the injection port to prevent losses of the more volatile esters; they are quantified at the milligram per liter level with a FID detector. The method thus developed was applied to the determination of free fatty acids in milk, cream, and butter samples; fatty acids were also added to some samples to induce rancidity in order to assess the method performance. Copyright 1994, American Chemical Society.
Fatty acids, free Ion exchange GC Preconcentration Amberlite