摘要
土壤和沉积物中POPs分析过程中的不确定度来源于样品制备、运输和保存、前处理和分析4个环节。土壤经四分法采样、均质化制样、快速溶剂萃取、多层符合硅胶柱净化、GC/MS分析。以p,p'-DDT为例,评定了各环节不确定度的大小,结果表明:样品前处理的不确定度分量对合成不确定度的贡献最大,约占90.6%;样品制备、保存和分析环节的贡献分别为5.4%、2.1%、1.9%。
There were four necessary steps in persistent organic pollutants analysis of soil and sediment, which was： sampiing, transportation and preservation, preparation, and analysis. The sources of uncertainty in the entire course of the determining p,p＇-DDT in soil and sediment with qual, homogeneity, ASE, multi -layer column cleaning, GC -MS were evaluated. The predominant uncertainty of 90.6% was from sample preparation, the others from sampling, transportation and preservation, and analysis were 5.4%, 2.1% and 1.9% respectively.
出处
《化学分析计量》
CAS
2011年第2期19-23,共5页
Chemical Analysis And Meterage
基金
国家重点基础研究发展计划(973计划)项目(2009CB421602)
环保行业公益性科研专项(HBGY200709056)
关键词
持久性有机污染物
不确定度
土壤
沉积物
评定
persistent organic pollutant, uncertainty, soil, sediment, evaluation
