【摘要】 〔目的〕建立了一个简单、快速的多种有机氯农药残留同时分析的新方法。〔方法〕采用一种新的样品前处理方法 -基质固相分散 (MatrixSolidPhaseDisperse ,MSPD)从蔬菜水果中提取、净化 2 0种常用有机氯农药残留。用GC/ECD分析检测 ,GC/MSD(SIM)进行确证。由于基质固相分散集提取、过滤、净化于一步完成 ,使得样品的预处理变得非常简单 ,避免了样品均化、转溶、乳化、浓缩造成的待测农药组分的损失 ,大大提高了方法的准确度和精密度。〔结果〕2 0种有机氯农药的回收率在 81.2 %～ 117.2 %之间 ,相对标准偏差小于 10 % ,完全能满足蔬菜水果中农药残留的分析要求。〔结论〕该方法适用于各种新鲜蔬菜水果样品的分析。更多还原

【Abstract】 ? 〔Objective〕A effective and simple method based on a new sample preparation method-matrix solid-phase disperse and gas chromatography with electron capture detection is studied to determine 20 organochlorine pesticides in fruits and vegetables.〔Methods〕The pesticides are determined by gas chromatography with electron capture detection,while confirming is done by gas chromatography with masss elective detection in selected ion momitoring.As matrix solid-phasedisperse can do extracting,filtering and cleaning in the same time,the sample preparation becomes very simple and the losing of the pesticide residues in conventional sample preparation step such as homogenizing,transferring,emulsification and concentrating is avoided.Therefore,the accuracy and precision of the method are improved greatly.〔Results〕The recovery range is 81.2%～117.5%with relative standard deviation lower than 10%.〔Conclusions〕Most fruit and vegetable samples are appropriate to be analyzed by this method with satisfied results in our laboratory.更多还原