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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Metrological capability of the Brazilian laboratories of analyses of radionuclides in environmental samples.
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Metrological capability of the Brazilian laboratories of analyses of radionuclides in environmental samples.

机译：巴西实验室分析环境样品中放射性核素的计量能力。

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摘要

The metrological capability of 24 Brazilian laboratories of radionuclide determinations in environmental samples was analysed for purposes to establish requirements for accreditation of laboratory for each radionuclide. For each type of analysis, the range of activity per unit mass or volume, the range of the reference value and its correspondent uncertainty were described. The accuracy was established using the statistical criteria of USE.P.A. for the laboratory performance classification. The precision of the analyses, expressed by its variation coefficient of the laboratory determinations, was classified in intervals of 5%. The data base was constituted by 3013 results of analyses obtained in 28 intercomparison runs performed from 1991 to 2000, for K, Th, Unat, gross alpha, gross beta, and other 27 radionuclides, in matrices of water, soil, vegetation, air filter and milk. The quality criteria established were the variation coefficient less than 5% and good performance in intercomparison runs. Results included from 5% to 10% are also considered, for special types of matrices and radionuclides.
机译：分析了巴西24个实验室对环境样品中放射性核素测定的计量能力，以建立对每种放射性核素进行实验室鉴定的要求。对于每种类型的分析，均描述了单位质量或体积的活动范围，参考值范围及其相应的不确定性。使用USE.P.A.的统计标准确定准确性。用于实验室性能分类。用实验室测定的变异系数表示的分析精度以5％为间隔进行分类。该数据库由1991年至2000年进行的28次比对运行得到的3013个分析结果构成，这些分析涉及水，土壤，植被，空气过滤器中的K，Th，Unat，总α，总β和其他27种放射性核素。和牛奶。确立的质量标准是变异系数小于5％，并且在对比试验中表现良好。对于特殊类型的基质和放射性核素，还应考虑5％至10％的结果。

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