title: Identification of Oxidation Compounds of 1-Stearoyl-2-linoleoyl-sn-glycero-3-phosphoethanolamine during Thermal Oxidation.
abstract: Heat-induced oxidative modification of phosphatidylethanolamine molecular species as potential functional food components was investigated. 1-Stearoyl-2-linoleoyl-sn-glycero-3-phosphoethanolamine (SLPE) was chosen as a model. The optimal temperature for hydroperoxide formation was determined by mass spectrometry. The maximal level of formation of this compound was obtained at 125 °C. The structures of nonvolatile organic compounds (non-VOCs) were identified using liquid chromatography-electrospray ionization mass spectrometry combined with an acid treatment. Kinetics of formation of non-VOCs was monitored over time. Results showed that the level of the SLPE precursor rapidly decreased during thermal oxidation and oxygenated products, such as hydroxyl, oxo, or epoxy groups, were formed. The VOCs formed from oxidized SLPE were determined by headspace solid-phase microextraction followed by gas chromatography-mass spectrometry analysis. The result showed that a saturated methyl ketone (2-heptanone) was the most predominant VOC of SLPE. Kinetics indicated that the formation of VOCs was related not only to the decomposition of hydroperoxides but also to the further decomposition of non-VOCs.
authors.affiliation: College of Food Science and Technology, Nanjing Agricultural University , Nanjing, Jiangsu 210095, People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhou
authors.affiliation: Equipe de Chimie Analytique des Molécules Bioactives (IPHC-LC4, UMR 7178), Université de Strasbourg , 74 route du Rhin, 67400 Illkirch, France.
authors.forename: Minjie
authors.initials: M
authors.lastname: Zhao
authors.affiliation: Equipe de Chimie Analytique des Molécules Bioactives (IPHC-LC4, UMR 7178), Université de Strasbourg , 74 route du Rhin, 67400 Illkirch, France.
authors.forename: Françoise
authors.initials: F
authors.lastname: Bindler
authors.affiliation: Equipe de Chimie Analytique des Molécules Bioactives (IPHC-LC4, UMR 7178), Université de Strasbourg , 74 route du Rhin, 67400 Illkirch, France.
authors.forename: Eric
authors.initials: E
authors.lastname: Marchioni
mesh_terms: D004983:Ethanolamines / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D006358:Hot Temperature; D007700:Kinetics; D015394:Molecular Structure; D010084:Oxidation-Reduction; D010714:Phosphatidylethanolamines / Q000737:chemistry
chemical_list: D004983:Ethanolamines; D010714:Phosphatidylethanolamines; C483858:phosphatidylethanolamine; C005448:phosphorylethanolamine
keywords: HS-SPME-GC-MS; LC−ESI-MS; VOC; kinetics; non-VOC; phosphatidylethanolamine