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环境化学  2015 

土壤中短链氯化石蜡的气相色谱-电子捕获负化学电离-质谱分析方法

Keywords: 短链氯化石蜡,分析方法,土壤,GC-ECNI-LRMS

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Abstract:

通过考察层析柱对测定短链氯化石蜡(SCCPs)干扰物去除效果的影响,结合实际土壤样品的净化需求,建立了一套适合分析土壤中SCCPs的前处理方法.土壤样品使用索氏抽提,采用硅胶复合柱和弗罗里硅土柱净化,运用气相色谱-质谱(ECNI源)检测SCCPs.SCCPs的仪器定量限为100—600pg·μL-1.空白加标和基质加标中SCCPs的回收率分别为130%±8.50%和108%±17.8%(SD,n=3).利用该方法分析了采自广州市郊区的6个土壤样品,其SCCPs的含量范围为12.9—34.5ng·g-1,平均值为26.1ng·g-1.

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