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毛细管柱气相色谱法测定中草药中8种有机氯农药残留

Chinese Journal of Coal Industry Medicine(2009)

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Abstract
目的建立中草药中8种有机氯农药残留的气相色谱分析方法,为中草药中有机氯残留检测提供有效的技术手段。方法样品采用正己烷:石油醚:丙酮(V:V:V,2:2:1)萃取4h,超声波震荡提取30min,过氟罗里硅土层析柱净化,80℃水浴蒸发近干,GC-ECD检测分析。结果对样品前处理条件进行优化,采用DB-5石英毛细管柱分离样品,GC-ECD测定8种有机氯残留,8种有机氯农药残留组分在25min内能够很好的分离,其质量浓度与色谱峰面积在0.01~5.00μg/ml的浓度范围内呈线性关系,检出限<0.02μg/ml。该方法二个水平的加标回收率是83.4%~115.6%,RSD是2.1%~7.3%。结论该方法简便成本低,准确度高,利用该方法检测的4种中草药样品中的六六六(HCH)和滴滴涕(DDT)残留均未超标。
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Key words
capillary gas chromatography,herb,dichloro-diphenyl-trichloroethane,hyxachlorocyclohexane,organochlorine residues
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