摘要
建立了测定韭菜和姜上虫螨腈及其代谢物溴代吡咯腈的残留检测方法。样品通过乙腈提取,采用40mg PSA、10mg C_(18)、5mg MWCNT净化,虫螨腈采用气相色谱-串联质谱法分析,溴代吡咯腈采用超高效液相色谱-串联质谱法分析。试验结果表明,虫螨腈和溴代吡咯腈在浓度0.001~0.5mg/L的范围内,标准曲线线性关系良好,相关系数>0.99。添加浓度为0.01、1和10mg/kg时,虫螨腈在韭菜上的平均回收率为88.4%~104%,相对标准偏差分别为1.5%~3.9%;在姜上的平均回收率为93.0%~99.9%,相对标准偏差分别为2.8%~4.9%;溴代吡咯腈在韭菜上的平均回收率为87.8%~98.9%,相对标准偏差分别为4.0%~4.6%;在姜上的平均回收率为87.2%~94.7%,相对标准偏差分别为2.7%~4.6%。该方法准确性好、灵敏度高,适用于虫螨腈及其代谢物在韭菜和姜上的残留检测。
The study established a method for the determination of chlorfenapyr and its metabolite tralopyril in leek and ginger.The samples were extracted with acetonitrile and purified with 40mg PSA,10mg C_(18) and 5mg MWCNT.Chlorfenapyr was analyzed by GC-MS/MS and tralopyril by UPLC-MS/MS.The results showed that there was a good linear relationship for chlorfenapyr and tralopyril in the concentration range of 0.001~0.5mg/L,with the correlation coefficient of more than 0.99.When the matrix concentration were 0.01mg/kg,1mg/kg and 10mg/kg,the average recoveries of chlorfenapyr in leek were 88.4%~104%with relative standard deviations of 1.5%~3.9%,and the average recoveries 93.0%~99.9%with the relative standard deviations 2.8%~4.9%in ginger.The average recoveries of tralopyril in leek were 87.8%~98.9%,with relative standard deviations of 4.0%~4.6%,and the average recoveries 87.2%~94.7%with the relative standard deviations 2.7%~4.6%in ginger.The method is accurate,sensitive and suitable enough for the determination of chlorfenapyr and its metabolites in leek and ginger.
作者
张俊杰
廖先骏
许乐园
胡佩杰
曹常鹏
孙丰收
Zhang Junjie;Hu Peijie;Cao Changpeng;Sun Fengshou(College of Plant Protection,Shandong Agricultural University,Taian Shandong 271018,China)
出处
《农药科学与管理》
CAS
2021年第6期35-40,共6页
Pesticide Science and Administration
基金
山东省大学生创新创业训练计划项目,项目编号S202010434108。
