title: Decomposition products of glycidyl esters of fatty acids by heating.
abstract: In this study, decomposition products of glycidyl palmitate (GP) of fatty acids heated at high temperature such as deep frying were investigated. When GP and tripalmitin (TP) were heated at 180 and 200 °C, they were decreased with heating time. The weight of GP was less than that of TP, although both GP and TP were converted to polar compounds after heating. The decomposition rate of GP was higher than TP. Both GP and TP produced considerable amounts of hydrocarbons and aldehydes during heating. Aldehydes produced from GP and TP included saturated aldehydes with carbon chain length of 3-10, while hydrocarbons consisted of carbon chain length of 8-15. It was observed that major hydrocarbons produced from GP during heating were pentadecane. Moreover, the level of carbon dioxide (CO2) released from GP was higher than that of TP. It was suggested that fatty acids in GE might be susceptible to decarboxylation. From these results, GP might be quickly decomposed to hydrocarbons, aldehydes and CO2besides polar compounds by heating, in comparison with TP.
authors.affiliation: a School of Bioscience and Biotechnology , Tokyo University of Technology , Hachioji , Japan.
authors.forename: Wataru
authors.initials: W
authors.lastname: Kimura
authors.affiliation: a School of Bioscience and Biotechnology , Tokyo University of Technology , Hachioji , Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Endo
mesh_terms: D000447:Aldehydes / Q000032:analysis / Q000737:chemistry; D000473:Alkanes / Q000737:chemistry; D002855:Chromatography, Thin Layer; D003296:Cooking; D004852:Epoxy Compounds / Q000737:chemistry*; D005227:Fatty Acids / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D006361:Heating; D006838:Hydrocarbons / Q000032:analysis / Q000737:chemistry; D010168:Palmitates / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry; D013696:Temperature; D014280:Triglycerides / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D000473:Alkanes; D004852:Epoxy Compounds; D005227:Fatty Acids; D006838:Hydrocarbons; D010168:Palmitates; D010938:Plant Oils; D014280:Triglycerides; C033245:pentadecane; C005859:tripalmitin
keywords: aldehydes; carbon dioxide; glycidyl esters; hydrocarbons; thermal decomposition