GC/MS法测定大米中精噁唑禾草灵和氰氟草酯残留量  

Determination of fenoxaprop-p-ethyl and cyhalofop-butyl in rice by GC/MS

作　　者：邵辉[1] 张玉婷[1] 李娜[1] 刘磊[1] 李辉[1] 宋淑荣[1] 郭永泽[1] 

机构地区：[1]天津市农业科学院中心实验室,天津300381

出　　处：《分析试验室》2012年第3期97-100,共4页Chinese Journal of Analysis Laboratory

摘　　要：采用乙腈提取,NH2固相萃取柱净化,GC/MS测定,建立了大米中精噁唑禾草灵和氰氟草酯残留量的测定方法。添加精噁唑禾草灵质量分数为0.02,0.2,0.5mg/kg,平均回收率分别为82.3%,88.8%和90.7%,相对标准偏差分别为6.8%,8.2%和3.7%,检出限为0.02 mg/kg;添加氰氟草酯质量分数为0.02,0.2,0.5mg/kg,平均回收率分别为87.7%,94.2%和92.3%,相对标准偏差分别为8.6%,5.6%和7.3%,检出限为0.02mg/kg。Rice samples were extracted with acetonitrile, and cleaned up by a NH2 solid phase extraction column. An accurate GC/MS method for the determination of fenoxaprop-p-ethyl and cyhalofop-butyl in rice was developed. Precision and accuracy of fenoxaprop-p-ethyl were assessed by adding fenoxaprop-p-ethyl into rice at three concentration levels （0. 02,0. 2 and 0. 5mg/kg） using five replicates at each level. The average recoveries of fenoxaprop-p-ethyl were 82. 3% ,88.8% and 90. 7% with the RSDs between 3.7% and 8.2%, and the limit of detection was 0. 02 mg/kg. Likewise, precision and accuracy of cyhalofop-butyl were assessed by adding cyhalofop-butyl into rice at three concentration levels （0. 02,0. 2 and 0. 5mg/kg） using five replicates at each level. The average recoveries of cyhalofop-butyl were 87.7% ,94. 2% and 92.3% with the RSDs between 5.6% and 8.6 %, and the limit of detection was 0. 02 mg/kg.

关 键 词：GC/MS 测定 大米 精噁唑禾草灵 氰氟草酯 

分 类 号：O657.63[理学—分析化学]