Document Detail

Quantitative determination of epoxy acids, keto acids and hydroxy acids formed in fats and oils at frying temperatures.
MedLine Citation:
PMID:  18849035     Owner:  NLM     Status:  MEDLINE    
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.
S Marmesat; J Velasco; M C Dobarganes
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-09-30
Journal Detail:
Title:  Journal of chromatography. A     Volume:  1211     ISSN:  0021-9673     ISO Abbreviation:  J Chromatogr A     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-05     Completed Date:  2009-01-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9318488     Medline TA:  J Chromatogr A     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  129-34     Citation Subset:  IM    
Instituto de la Grasa (CSIC), Padre García Tejero 4, 41012 Seville, Spain.
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MeSH Terms
Chromatography, Gas
Epoxy Compounds / analysis*
Fats / chemistry*
Hot Temperature
Hydroxy Acids / analysis*
Keto Acids / analysis*
Oils / chemistry*
Solid Phase Extraction / methods
Reg. No./Substance:
0/Epoxy Compounds; 0/Fats; 0/Hydroxy Acids; 0/Keto Acids; 0/Oils

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