气相色谱法检测食用植物油掺假的方法

The Method of Detecting Edible Plant Oil Admixture by GC

近年来由于利益驱动,少数不法商贩在植物油生产销售过程中以次充好,或掺杂掺假,坑害消费者。相关技术标准或规范中也没有全面快速有效的检测方法。本方法根据植物油的分子结构组成的不同,在对植物油进行甲脂衍生化后,使植物油中的甘油三酸脂中的有机酸与甲醇形成简单有机甲脂化合物,再利用气相色谱仪分析各种有机酸成份含量比例。如各有机酸含量比例与经验值有较大差别,就可判断掺假。与其它的物理、化学的方法结合从而定性定量分析植物油掺假现象。

In recent years, a handful of illegal mongers sell mixed plant oil because of benefit driving, and do harm to consumers. There is no overall fast valid examination method in the related technique standard or norms. This method according to the dissimilarity that the molecular structure of the plant oil constitutes, after carrying on derive, make organic acid within triglyceride and methyl alcohol compound together, then analyze the content of kinds of organic acid by GC. We can make a judgment if there is bigger difference between the experience value and testing value. Combined with the other physical and chemical methods, we can analyze the admixture phenomenon of plant oil.