毛细管气相色谱法测定食用油中反式脂肪酸

Determination of trans fatty acids in edible oil by capillary gas hromatography

选用氢氧化钾-甲醇法甲酯化，以SP-2560毛细管色谱柱用气相色谱法测定反式脂肪酸。结果表明，采用合适的分析条件，可以很好地将反式油酸和反式亚油酸跟其它的脂肪酸分开；反式油酸和反式亚油酸在市售的食用一级油中普遍存在。

After converted to methyl esters with KOH-CH3OH, trans fatty acids in edible oil were separated and analyzed by capillary gas （SP-2560） chromatography. The results showed that trans-oleic acid and trans-linoleic acid could be well separated from other fatty acids under optimal conditions. Trans-oleic acid and trans-linoleic acid were generally existed in the first level edible oil in the market.