摘要
建立了GC/MS法同时测定豇豆中水胺硫磷等37种农药残留的方法。农药经过乙腈提取,NH2/CARBON复合固相萃取小柱净化,HP-5MS(30 m×0.25 mm×0.25μm)弹性石英毛细管柱分离后,用GC/MS选择离子模式进行测定。农药在0.020～0.500 mg/L时与峰面积有良好的线性关系(r2>0.990)。农药在0.10 mg/kg的添加水平时,回收率为73%～126%,RSD(n=3)为4.3%～14%。方法适用于豇豆中多种农药残留的测定要求。
A method based on GC/MS was developed to detect 37 pesticides residues included isocarbophos in cowpeas.Pesticides were extracted with acetonitrile,cleaned up by an NH2/CARBON SPE column,separated on a capillary column（HP-5MS,30 m×0.25 mm×0.25 μm） and determined with GC/MS/SIM.The linear ranges of the determination were 0.020~0.500 mg/L（r20.99）.The recoveries of all pesticides were in the range of 73%~126% with RSD（n=3） of 4.3%~14% at the spiked level of 0.10 mg/kg.This method is suitable for the detection of multi-pesticide residues in cowpeas.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2011年第1期96-101,共6页
Chemical Research and Application
