天然水体底质中Mn元素含量采样和分析质量控制研究

利用采样和分析全程质量控制程序(SAX),对于吉林省内7个天然水体底质中Mn元素的采样和分析过程进行了质量控制(QC)实例研究.实验采用了平行采样平行分析的设计方案,并进行了空白实验、重复测定和加标回收率的测定.然后利用稳健方差分析(Robust ANOVA)计算了采样分析全过程中的地理方差、采样方差和分析方差,并对整个质控过程按照适目的性原则进行了评价.通过本文的研究以及其他工作成果,可知评价中采用的比例限值标准在一般意义下的SAX过程中是行之有效的.但是,也应注意到该限值标准不是绝对的,在具体的实验设计中需要考虑多方面因素.

Study on Sampling and Analyzing Quality Control of Manganese Element in Sediment of Natural Water

Applying the sampling and analytical quality control scheme(SAX),we conducted a quality control case study on sampling and analyzing for Manganese element in sediment of 7 natural water bodies in Jilin Province.Duplicate sample at each sites and duplicate analysis of each sample were adopted in the experiment designing.In addition,reagent blank test,duplicate test on one same sample and spike recovery test were also carried out.The geochemical variance,sampling variance and analysis variance of the whole process were calculated respectively by robust analysis of variance method,then the fitness for purpose assessment for the quality control study was presented.The results of the case study in this paper and the other relative works show that the ratio value applied in the assessment is an effective one in SAX.But we should also recognize that the value is not an absolute one,many factors should be considered in the experiment design.