Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1211, Issue 1-2, Pages 129-134Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2008.09.077
Keywords
Epoxy acids; GC; Hydroxy acids; Hydrogenation; Keto acids; Solid-phase extraction
Funding
- Ministerio de Educacion y Ciencia [AGL2007-62922]
- Junta de Andalucia
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A method based on derivatization to fatty acid methyl esters and GC is proposed for the quantitative analysis of hydroxy acids, keto acids and epoxy acids in fats and oils. Isolation of the analytes by solid-phase extraction is proposed to prevent analytical interferences Caused by non-altered fatty acids naturally occurring in oils. In addition, hydrogenation is required before the GC analysis to improve repeatability. The analytical method was applied to thermoxidized samples of high linoleic sunflower oil, high oleic sunflower oil and high palmitic sunflower oil. Results showed total levels of these compounds in the order of mg/g of oil in samples with contents of polar compounds ranging from 6.7 to 25.7%. The compounds analyzed constituted major fractions of the oxidized fatty acids. (C) 2008 Elsevier B.V. All rights reserved.
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