The methylated fatty acids were analyzed by GC-MS. 14 kinds of fatty acids were detected by method 1 and 24 fatty acids were detected by method 2.

• 方法一共检测出14种脂肪酸，主成分为油酸、亚油酸、山嵛酸、棕桐酸、硬脂酸和二十碳烯酸；