The sample is extracted with a mixed solvent of petroleum ether and benzene, and then esterified with KOH-CH 3OH. The esterified sample is determined by GC-FID, using 10%DEGS column.

• 样品经石油醚 苯混合溶剂提取 ,用KOH CH3 OH溶液进行甲酯化 ,用GC FTD 10%25DEGS为分离柱 ,测定脂肪酸的组成。