有机酸对油脂酸价测定的影响  

The Influence of Organic Acids on the Determination of Acid Value of Oils and Fats

作　　者：曹雄杰 周金沙 周鹏 尹芳平 刘曼舒 肖艳 CAO Xiongjie;ZHOU Jinsha;ZHOU Peng;YIN Fangping;LIU Manshu;XIAO Yan(Changsha Institute for Food and Drug Control,Changsha 410016;College of Food Science and Technology,Hunan Agricultural University,Changsha 410128;Hunan International Travel Heal Thcare Center(Portalclinic of Changsha Customs),Changsha 410011)

机构地区：[1]长沙市食品药品检验所,长沙410016 [2]湖南农业大学食品科技学院,长沙410128 [3]湖南国际旅行卫生保健中心(长沙海关口岸门诊部),长沙410011

出　　处：《食品工业》2024年第6期85-88,共4页The Food Industry

基　　金：湖南省市场监督管理局科技计划项目(2023KJJH30)。

摘　　要：研究抗坏血酸、柠檬酸、酒石酸、没食子酸、乙酸、马来酸、苯甲酸7种有机酸对植物油酸价测定的影响。使用GB 5009.229—2016食品中酸价的电位滴定法,检测7种有机酸随石油醚进入待测样品中影响油脂酸价的情况。结果表明,直接测定时添加量对酸价的影响呈线性增大,通过石油醚溶解、无水硫酸钠除水、去除溶剂后测定的酸价最终反映的是体系中脂溶性有机酸的量。氧化试验表明没食子酸、酒石酸、柠檬酸、抗坏血酸等有机酸可使油脂的酸价变化减缓。The effects of ascorbic acid,citric acid,tartaric acid,gallic acid,acetic acid,maleic acid and benzoic acid on the determination of plant oleic acid value were studied.Potentiometric titration method GB 5009.229—2016 for acid value in food was used to detect the influence of seven organic acids on acid value of oils and fats as petroleum ether entered the samples to be tested.The results showed that the effect of additive amount on acid value increased linearly in direct determination.The acid value measured after petroleum ether dissolution,anhydrous sodium sulfate dewatering and solvent removal ultimately reflected the amount of fat-soluble organic acids in the system.Oxidation experiments showed that organic acids such as gallic acid,tartaric acid,citric acid and ascorbic acid could slow down the change of acid value of oil.

关 键 词：有机酸 酸价 电位滴定 植物油 

分 类 号：TS207.3[轻工技术与工程—食品科学] O657.1[轻工技术与工程—食品科学与工程]