【摘要】 采用气相色谱法研究了仲丁灵、氯氰菊酯、溴氰菊酯3种农药在烟叶中的残留情况。样品经乙腈提取,Florisil硅土和中性氧化铝双吸附剂层析柱净化,正己烷-乙酸乙酯(98∶2,V/V)洗脱剂洗脱和浓缩后,采用GC-ECD进行定性和定量分析。当样品的加标水平为0.05,0.25,1.0 mg/kg时,加标回收率为73.8%～89.4%,相对标准偏差在5.5%～10.3%之间。该方法可用于烟叶中农药残留的快速分析测定。更多还原

【Abstract】 A method was developed for rapid determination of 3 pesticide residues in tobacco based on gas chromatography.After the optimization of different parameters,such as the extraction solvent,elution solvent,purificant,and pesticides were extracted from tobacco with acetonitrile,cleaned-up on a column,packed with Florisi and neutral alumina,eluted with hexane-ethyl acetate(98:2,V/V),and then determined by GC-ECD.The recoveries were performed at 0.05,0.25 and 1.0 mg/kg fortification levels for each pesticide,and the recoveries ranged 73.8%~89.4% with the relative standard deviations between 5.5%~10.3%.Therefore,this method can satisfy the requirements for the rapid analysis of pesticides in the tobacco.更多还原