Method: The GC method using chromosorb WAW with 10%PEG-20M as the stationary phase,and the column temperature was 190 C. Hydrogen flame ionization detector was speci- fied.

• 方法:气相色潜法,3mm×4m不锈钢柱,10%25PEG-20M为固定液,Chromosorb WAW 60-80目担体,FID检测器,柱温190℃;