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

By Olivier Berdeaux, Stéphanie Fontagné Dicharry, Etienne Semon, Joaquin Velasco, Jean-Louis Sébédio and Carmen Dobarganes

Abstract

GC-MS and GC-FTIR were complementarily applied to identify oxidation compounds formed under frying conditions in methyl oleate and linoleate heated at 180 degrees C. 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

Topics: Thermoxidation, Gas-chromatography, Mass-spectrometry, Fourier transform infrared, Polar compounds, Short-chain glycerol-bound compounds, [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition
Publisher: 'Elsevier BV'
Year: 2012
DOI identifier: 10.1016/j.chemphyslip.2012.02.004
OAI identifier: oai:HAL:hal-02651969v1
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