油脂中的反式酸及其检测方法

Trans fatty acid in oils andTrans fatty acid in oils and its determination methods

油脂是人们摄取能量和必需脂肪酸的主要来源,对人体的健康起着至关重要的作用。油脂中的反式脂肪酸(TFA)是人们研究和争论的话题,但是经过长时间的研究,表明过多的摄入反式酸对人体有害。最近美国食品药品管理局(FDA)通过法案,强制性标注食品中反式酸的含量。为了控制油脂加工过程中反式脂肪酸的形成,对其影响因素及其定性、定量检测进行了论述。红外检测(IR)和Ag+薄层色谱可用来定性检测反式酸的存在,气相色谱可用来定量检测反式酸。

Fatty acids are always an important and hot topic in edible oils It is regarded that UFA, including CFA and TFA, is superior to SFA And CFA is commonly considered as safety and healthy However, TFA is a hot topic dur ing a long time and recently it is regarded as harmful to human beings The effect factors of the TFA and its determination methods were described.IR and Ag+-TLC can qualitatively determine the TFA,and GC can quantitatively analyze the TFA.