气相色谱同时测定食用油中甲草胺与腐霉利的残留量

建立了固相萃取-气相色谱-电子捕获检测器（SPE—GC—ECD）同时测定食用油中甲草胺和腐霉利的方法。样品经过乙腈提取、固相萃取柱净化，采用GC—ECD检测，外标法定量。在此条件下，甲草胺的回收率为92．9％-98．9％，相对标准偏差为2．52％-3．24％，腐霉利的回收率为92．8％-99．2％，相对标准偏差在3．42％-6．95％。该方法简便、快速，具有良好的灵敏度、重复性，可适用于食用油中甲草胺和腐霉利的残留检测。

Simultaneous Determination of Alachlor and Procymidone Residues in Edible Oil by Gas Chromatography

An analytical method was developed for the simultaneous determination of alachlor and procymidone residues in edible oil based on solid phase extraction （SPE） coupled with gas chromatography -electron capture de- tector （GC -ECD）. The pesticide residues in edible oil were extracted with acetonitrile, purified with solid phase extraction columns. Under this condition, the average recoveries in different addition levels of alachlor and procymidone were 92.9% - 98.9% and 92.8% - 99.2% , the relative standard deviations were 2.52% - 3.24% and 3. 42% -6.95%, respectively. The proposed method was sample, rapid, sensitive and applicable to the determination of alachlor and procymidone residues in edible oil.