我国主要食用植物油中反式脂肪酸的研究

以GB/T 22110-2008为检测方法,对我国市场上销售的主要食用植物油(调和油、大豆油、花生油、芝麻油)中反式脂肪酸含量进行测定.结果显示:十八碳类反式脂肪酸有6种检出,同一油种具有相同种类的反式脂肪酸,各种类反式脂肪酸含量变化具有同步性,并呈显著性相关,各类反式脂肪酸在产生时具有相同的异构几率；当一种食用植物油的某类反式脂肪酸总含量接近或超过相应脂肪酸组成含量时,这份油样肯定不是单一品种的油样；反式脂肪酸主要来源于食用植物油的精炼过程,尤其是脱臭过程；我国存在因为反式脂肪酸摄入量过高而影响健康的情况,消费者、企业及政府部门应对食用植物油中反式脂肪酸的含量引起足够的重视.

Investigation on trans fatty acids in the primary edible vegetable oil in China

The trans fatty acids(TFA)contents in some primary edible vegetable oil in the market,including blending oil,soybean oil,peanut oil and sesame oil,were determined according to the standard of GB/T 22110—2008.The results showed that six kinds of stearic TFA had been detected;the same sort of oil had the same varieties of TFA;variations of all kinds of TFA contents had synchronism,and were obviously related;the probability of TFA isomerism was the same when TFA were produced.A sample of oil must be mixed if a sort of the total TFA contents were next to or over the corresponding fatty acids contents.TFA were mainly produced in the refining procedure of edible vegetable oil,especially in the deodorization process.People’s health had been affected by the excessive ingestion of TFA in our country.It was suggested that consumers,enterprises and the government should pay close attention to TFA contents in edible vegetable oil.