甘二酯对油脂中抗氧化剂活性的影响  

Effects of DAG on activity of antioxidants in oils

作　　者：薛元强 刘思敏 韩立娟 齐玉堂 贺军波 张维农 XUE Yuanqiang;LIU Simin;HAN Lijuan;QI Yutang;HE Junbo;ZHANG Weinong(College of Food Science and Engineering,Wuhan Polytechnic University,Wuhan 430023,China;Engineering Research Center of Lipid-based Fine Chemicals of Hubei Province,Wuhan 430023,China)

机构地区：[1]武汉轻工大学食品科学与工程学院,武汉430023 [2]湖北省油脂精细化工工程技术研究中心,武汉430023

出　　处：《中国油脂》2020年第10期57-61,共5页China Oils and Fats

基　　金：国家自然科学基金资助项目(C200201)。

摘　　要：研究sn-1,3-棕榈酸甘二酯对纯净菜籽油氧化稳定性的影响,以期探明其作用机理,为油脂加工和储存提供科学的依据。通过柱层析的方法制备仅含甘三酯成分的纯净菜籽油,测定DAG在菜籽油中形成反相胶束的临界浓度,并在反相胶束体系中,研究DAG及与天然抗氧化剂γ-生育酚及合成抗氧化剂(TBHQ、BHA、BHT)联合作用对纯净菜籽油氧化稳定性的影响。结果表明:DAG在菜籽油中的临界胶束浓度为0.5%;在反相胶束体系中,DAG的添加促进了纯净菜籽油的氧化,DAG对不同种类的抗氧化剂活性的影响存在差异,DAG增强了弱极性抗氧化剂γ-生育酚、BHT的活性,但是减弱了极性较强的抗氧化剂TBHQ、BHA的活性。The effect of sn-1,3-dipalmitate(DAG)on the oxidation stability of pure rapeseed oil was investigated to find out its mechanism in oil during storage and provide a scientific basis for oil processing and storage.Rapeseed oil only containing triglyceride components was prepared by column chromatography purification,the critical reverse micelle concentration of DAG in pure rapeseed oil was determined,and the effect of DAG and combined effects of DAG and antioxidant(γ-tocopherol,TBHQ,BHA and BHT)on the oxidation stability of pure rapeseed oil in reverse micelle system were studied.The results showed that the critical micelle concentration of DAG in pure rapeseed oil was 0.5%.DAG had a prooxidant effect on pure rapeseed oil in reverse micelle system.DAG had different effects on the activity of different types of antioxidants,and it enhanced the activities of the weak polar antioxidants γ-tocopherol and BHT,but weakened the activities of the strong polar antioxidants TBHQ and BHA.

关 键 词：甘二酯 反相胶束 抗氧化 促氧化 

分 类 号：TS225[轻工技术与工程—粮食、油脂及植物蛋白工程] TQ641[轻工技术与工程—食品科学与工程]