在使用环境样品中放射性核素分析比对计划进行实验室性能评估时测量不确定度的影响。
The influence of uncertainties of measurements in laboratory performance evaluation using an intercomparison program of radionuclide assays in environmental samples.
作者信息
Tauhata Luiz, Couto Machado Vianna Maria Elizabeth, Eduardo de Oliveira Antonio, Cristina de Melo Ferreira Ana, Júlia Câmara da Silva Bragança Maura, Faria Clain Almir
机构信息
Instituto de Radioproteção e Dosimetria, Laboratório Nacional de Metrologia das Radiações Ionizantes, LNMRI/IRD/CNEN-Avenida Salvador Allende s/n, Recreio, CEP:22780-160, Rio de Janeiro, RJ, Brazil.
出版信息
Appl Radiat Isot. 2006 Oct-Nov;64(10-11):1174-8. doi: 10.1016/j.apradiso.2006.02.084. Epub 2006 Mar 29.
To show the influence of measurement uncertainties in performance evaluation of laboratories, data from 42 comparison runs were evaluated using two statistical criteria. The normalized standard deviation, D, used by US EPA, that mainly takes into account the accuracy, and the normalized deviation, E, that includes the individual laboratory uncertainty used for performance evaluation in the key-comparisons by BIPM. The results show that data evaluated by the different criteria give a significant deviation of laboratory performance in each radionuclide assay when we analyse a large quantity of data.
为了展示测量不确定度在实验室性能评估中的影响，使用两种统计标准对42次比对实验的数据进行了评估。美国环境保护局（US EPA）使用的归一化标准偏差D，主要考虑准确性；以及归一化偏差E，它包括国际计量局（BIPM）在关键比对中用于性能评估的各个实验室的不确定度。结果表明，当我们分析大量数据时，采用不同标准评估的数据在每种放射性核素分析中都显示出实验室性能的显著差异。
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