气相色谱-质谱法测定蔬菜中八氯二丙醚(S-421)的残留量  

Gas Chromatography-Mass Spectrometry Determination of Residual Octachlorodipropyl Ether(S-421) in Vegetable

作　　者：张卫锋[1] 洪振涛[1] 李嘉静[1] 邱瑞霞[1] 

机构地区：[1]广州市农业标准与监测中心,广州510308

出　　处：《福建分析测试》2008年第1期1-3,共3页Fujian Analysis & Testing

摘　　要：建立了蔬菜中八氯二丙醚(S-421)农药残留的气相色谱-质谱分析方法。样品采用乙腈提取,氯化钠盐析分层,取部分提取液使用氮气吹干,以正己烷溶解,加浓硫酸进行净化,最后用气相色谱-质谱法进行定量定性分析。在三个添加水平的八氯二丙醚(S-421)平均回收率(n=5)为86%～102%,相对标准偏差为3.2%～6.4%。该方法的检出限为0.005mg/kg。A method has been developed for the determination of Octachlorodipropyl Ether（ S - 421 ） residue in vegetable hy gas chromatography - mass spectrometry （ GC - MS）. The samples were extracted by aeetonitrile and salted out with sodium chloride. Some eluate was evaporated to dryness with Nitrogen gas. The residue was dissolved in n - hexane, and the concentrated sulphufic acid was spiked to clean up. In the following step, a little sample solution was then injected into the GC - MS system to quantitative and qualitative analysis. The mean recoveries of the drugs （ n =5 ） were 86% ～ 102% in three fortified level. The relative standard deviation（RSDs） were 3.2% ～ 6.4%. The limits of detection were 0. 005 mg/kg.

关 键 词：气相色谱-质谱法 八氯二丙醚(S-421) 残留量 蔬菜 

分 类 号：O657.71[理学—分析化学]