title: A detailed identification study on high-temperature degradation products of oleic and linoleic acid methyl esters by GC-MS and GC-FTIR.
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°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.
authors.affiliation: Plate-forme ChemoSens, Centre des Sciences du Goût et de l'Alimentation, UMR CNRS, UMR INRA, Université de Bourgogne, Agrosup Dijon, France. berdeaux@dijon.inra.fr
authors.forename: Olivier
authors.initials: O
authors.lastname: Berdeaux
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Fontagné
authors.forename: Etienne
authors.initials: E
authors.lastname: Sémon
authors.forename: Joaquin
authors.initials: J
authors.lastname: Velasco
authors.forename: Jean Louis
authors.initials: JL
authors.lastname: Sébédio
authors.forename: Carmen
authors.initials: C
authors.lastname: Dobarganes
mesh_terms: D000447:Aldehydes / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D007651:Keto Acids / Q000737:chemistry; D008041:Linoleic Acids / Q000737:chemistry*; D009829:Oleic Acids / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature
chemical_list: D000447:Aldehydes; D007651:Keto Acids; D008041:Linoleic Acids; D009829:Oleic Acids; C005575:methyl linoleate; C005576:methyl oleate