The kinetics of thermally induced isomerisation of trilinolenin, an improved gas chromatography study

文献类型： 外文期刊

第一作者： Jiang, Fan

作者： Jiang, Fan;Guo, Qin;Li, Qingpeng;Jin, Jing;Ha, Yiming;Jiang, Fan

作者机构：

关键词： Gas chromatography;isomerisation;kinetics;trilinolenin

期刊名称：INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY （ 影响因子：3.713； 五年影响因子：3.408 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The isomerisation reaction kinetics of heated trilinolenin was examined to better understand the mechanisms and controlling steps of the reaction. Trilinolenin was placed in glass ampoules and sealed before heating to 200, 220, 230 and 240 degrees C for regular time intervals. The contents were analysed using a newly established gas chromatography (GC) method that had been successfully applied to the separation of trans linolenic acid (TLNA) isomers. The kinetic studies show that the consumption of LNA is a second-order reaction while the formations of trans LNA (TLNA) isomers are zero-order reactions. The rate of the isomerisation reactions increases steadily with temperature and time, and the isomerisation mechanisms involved in the formation of TLNA isomers during heating are verified. These results suggest that controlling the formation of single TLNA isomers may be a key way to reduce TLNA isomers during heating of edible oils.

分类号： TS2

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