川滇黔桂76种元素地球化学图编制中分析方法与分析质量研究(三)

    Age and geochemical characteristics of Quaternary volcanic rocks in the northwestern margin of Tibetan Plateau and their significance.

    • 摘要: 为辨别环境动态变化而进行的多期次环境地球化学填图要求降低不同期次数据间的分析误差。为达此目的,本文提出了衡量各实验室分析质量的新的考核标准,包括:一组标准样不同元素分析值与标准值对数偏差的不合格率;一组标准样不同元素分析值与标准值的相关系数所反映的相似性系数;一组标准样各种元素分析值与标准值在虚拟空间上图形分布的相似性。

       

      Abstract: Multi-period environmental geochemical mapping for obtaining a continuous record of environmental change requires the reduction of between-period analytical bias(variable bias). Criteria are developed to run the proficiency test for analytical laboratories involved in such kind of work. These include (1) the rate of unqualification of △logC, (2) the similarity coefficient calculated as the correlation coefficient between element values of a group of standard reference samples and values of these samples determined by different laboratories, and (3) the similarity of maps composed of element values of many standard reference samples in virtualized spatial distribution with maps composed of element values determined by different labs.

       

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