L-抗坏血酸棕榈酸酯对亚麻酸甘油三酯热致异构反式产物动力学的影响  

Effects of L-ascorbyl Palmitate on the Kinetics of Thermally Induced Trans Products of Trilinolenin

作　　者：郭芹[1] 陈爽 郑佳丽[1,2] 李庆鹏 王强[1] 哈益明[1] Guo Qin;Chen Shuang;Zheng Jiali;Li Qingpeng;Wang Qiang;Ha Yiming(Institute Agro-products Processing Science and Technology,Chinese Academy of Agricultural Sciences/Comprehensive Key Laboratory of Agro-Products Processing,Ministry of Agriculture,Beijing 100193;Beijing Institute of Petrochemical Technology,Beijing 102617)

机构地区：[1]中国农业科学院农产品加工研究所/农业部农产品加工综合性重点实验室,北京100193 [2]北京石油化工学院,北京102617

出　　处：《中国食品学报》2020年第2期127-135,共9页Journal of Chinese Institute Of Food Science and Technology

基　　金：国家自然科学基金项目(31772097);“十三五”国家重点研发计划项目(2017YFC1600600)

摘　　要：研究0.02%L-抗坏血酸棕榈酸酯(L-AP)对亚麻酸甘油三酯在200~240℃加热2~48 h反式产物的动力学的影响。采用高极性离子液毛细管柱分析亚麻酸甘油三酯高温加热,结果有3种单反式(C18:3-9t,12c,15c、C18:3-9c,12t,15c和C18:3-9c,12c,15t)和2种反式(C18:3-9t,12c,15t和C18:3-9t,12t,15c)异构体生成,该反应为零级反应。L-AP虽然不改变单反式和双反式异构体的形成反应级数,但是能降低单反式和双反式异构体的形成速率,其主要作用是抑制单反式异构体的形成,主要作用位点是先阻止亚麻酸链上15位氢发生异构,然后依次是9位和12位氢发生异构。此外,建立L-AP存在条件下,亚麻酸甘油三酯热致异构反式产物浓度与加热温度和时间的预测模型。Effects of 0.02% L-ascorbyl palmitate(L-AP) on the kinetics of trans products of trilinolenin heated at 200-240 ℃ for 2-48 h were studied. Three kinds of single trans isomers(C18:3-9 t,12 c,15 c, C18:3-9 c,12 t,15 c and C18:3-9 c,12 c,15 t) and two kinds of double trans isomers(C18:3-9 t,12 c,15 t and C18:3-9 t,12 t,15 c) were detected in heated trilinolenin analyzed by highly polar ionic liquid capillary columns. The formations of these trans isomers were zero-order reactions, and the reaction orders of these isomers were not changed by the addition of L-AP. L-AP could inhibit the formation rates of single and double trans isomers. The main role of L-AP was to inhibit the formation of single trans isomers, and the inhibit site was the isomerization of 15 hydrogen in linoleic acid chain, followed by 9 hydrogen12 hydrogen. In addition, the forecasting model of thermally induced trans products concentration of trilinolenin, heating temperature and time were established in the presence of L-AP.

关 键 词：L-抗坏血酸棕榈酸酯 亚麻酸甘油三酯 加热 反式产物 动力学 

分 类 号：TS202.3[轻工技术与工程—食品科学] TS225.1[轻工技术与工程—食品科学与工程]