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Title

A detailed identification study on high-temperature degradation products of oleic and linoleic acid methyl esters by GC-MS and GC-FTIR

AuthorsBerdeaux, O.; Fontagné, Stéphanie; Sémon, Etienne; Velasco, Joaquín ; Sébédio, Jean Louis; Dobarganes, M. Carmen
KeywordsThermoxidation
Gas-chromatography
Mass-spectrometry
Fourier transform infrared
Polar compounds
Short-chain glycerol-bound compounds
Issue DateApr-2012
PublisherElsevier
CitationChemistry and Physics of Lipids 165(3): 338-347 (2012)
AbstractGC-MS and GC-FTIR were complementarily applied to identify oxidation compounds formed under frying conditions in methyl oleate and linoleate heated at 180ºC. The study was focused on the compounds that originated through hydroperoxide scission that remain attached to the glyceridic backbone in fats and oils and form part of non-volatile molecules. Twenty one short-chain esterified compounds, consisting of 8 aldehydes, 3 methyl ketones, 4 primary alcohols, 5 alkanes and 1 furan, were identified. In addition, twenty non-esterified volatile compounds, consisting of alcohols, aldehydes and acids, were also identified as major non-esterified components. Furanoid compounds of 18 carbon atoms formed by a different route were also identified in this study. Overall, the composition of the small fraction originated from hydroperoxide scission provides a clear idea of the complexity of the new compounds formed during thermoxidation and frying.
URIhttp://hdl.handle.net/10261/52602
DOI10.1016/j.chemphyslip.2012.02.004
Identifiersdoi: 10.1016/j.chemphyslip.2012.02.004
issn: 0009-3084
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