基质固相分散萃取-气相色谱法测定罗汉果中六六六、滴滴涕

目的 建立罗汉果中六六六、滴滴涕的基质固相分散萃取(MSPD)-气相色谱(GC)分析方法。方法 采用基质固相分散萃取技术作为前处理方法, 用气相色谱法进行快速定性定量分析。结果 八种有机氯农药的添加回收率在75.1%~112.4%之间, 相对标准偏差为2.1%~12.4%之间。基质固相分散萃取将提取、过滤和净化一步完成, 简化了传统样品的前处理过程, 缩短了时间, 节省溶剂, 也减少了对环境的污染。结论 该方法作为罗汉果中的六六六、滴滴涕有机氯农药残留的快速检测新方法, 基本能满足国内以及国际对农药残留分析质量控制要求。

Determination of hexachlorocyclohexane and dichlorodiphenyl trichloroethane in Siraitia grosvenori. fruits by matrix solid phase dispersion-gas chromatography

Objective To establish a method for the analysis of hexachlorocyclohexane (HCH) and dichlorodiphenyl trichloroethane (DDT) by matrix solid phase dispersion-gas chromatography (MSPD-GC). Methods The samples were pretreated by matrix solid phase dispersion, and then qualitatively and quantitatively determined byGC. Results The recoveries range from 75.1% to 112.4%, with the RSD of 2.1%~12.4%. The matrix solid phase dispersion can make extracting, filtering and cleaning in one step which made the sample preparations become rapid. Conclusion The new method as the rapid analysis of organochlorine pesticide BHC and DDT in Siraitia grosvenori. fruits can basically meet the requirements of pesticide residue analysis standard in the domestic and international.