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Metrological capability of the Brazilian laboratories of analyses of radionuclides in environmental samples
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 ra...
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Published in: | Applied radiation and isotopes 2002-01, Vol.56 (1), p.409-414 |
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creator | Tauhata, L Vianna, M.E.C de Oliveira, A.E Ferreira, A.C.M da Conceição, C.C.S |
description | 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, U
nat, 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. |
doi_str_mv | 10.1016/S0969-8043(01)00223-8 |
format | article |
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nat, gross alpha, gross beta, and other 27
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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, U
nat, 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. 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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, U
nat, 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.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>11842806</pmid><doi>10.1016/S0969-8043(01)00223-8</doi><tpages>6</tpages></addata></record> |
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subjects | Air Pollutants, Radioactive - analysis Animals Brazil environmental samples Food Contamination, Radioactive - analysis Humans Laboratories - standards Milk - chemistry Radioactive Pollutants - analysis Radioactive Pollutants - standards Radioisotopes - analysis Radioisotopes - standards Soil Pollutants, Radioactive - analysis Technology, Radiologic Water Pollutants, Radioactive - analysis |
title | Metrological capability of the Brazilian laboratories of analyses of radionuclides in environmental samples |
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