摘要
用乙腈、水混合液(体积比1:1)提取,提取液经无水硫酸镁和PSA吸附剂处理,经0.45μm滤膜过滤后,以乙腈/水(含5 mmol/L乙酸铵)溶液作流动相,流速200μl/min,采用高效液相色谱-串联质谱法同时测定了烟草中6种有机氮的农药残留量。检测限为0.01～0.10μg/kg,回收率为70%～107%,相对标准偏差不大于8.92%。
A method based on liquid chromatography tandem mass spectrometry was developed for simultaneously determining the residues of six organic nitrogen pesticides in tobacco. The samples were extracted with 50% （v/v） acetonitrile water solutio and the extracts were cleaned up with primary secondary amine （PSA） adsorbent and magnesium sulfate, then filtrated by 0. 45 μm filter membrane, and then analyzed by LC - MS/MS using water containing 0. 05% acetic acid and acetonitrile as a mobile phase at the flow rate of 200 μl/minute. The detection limit and the organic nitrogen pesticides recoveries rate were 0.01 to 0. 10 μg/kg and 70% to107% respectively, with relative standard division below 8.92%.
出处
《环境科学与管理》
CAS
2011年第8期147-152,146,共7页
Environmental Science and Management
