Analytical condition were as follows, column: 10% modified polyethylene glycol 20M on acid washed 201, 2m column with 3 mm i. d., FID as detector, phe-nylmethyl ketone as internal standard compound.

• 以10%25改性聚乙二醇20M为固定液，苯乙酮为内标物，氢火焰离子化检测器，内标法定量分析异辛酸。