| TUO Fei,XU Cui-hua,ZHANG Jing,et al.Nationwide intercomparison of 226Ra,232Th and 40K for soil and building material by γ-spectrometry analyses in 2008[J].Chinese Journal of Radiological Medicine and Protection,2010,30(3):343-345 |
| Nationwide intercomparison of 226Ra,232Th and 40K for soil and building material by γ-spectrometry analyses in 2008 |
| Received:August 14, 2009 |
| DOI：10.3760/cma.j.issn.0254-5098.2010.03.031基金项目:卫生部卫生行业科研专项资助(200802018)作者单位:100088 北京, 中国疾病预防控制中心辐射防护与核安全医学所 |
| KeyWords:γ-spectrometry Intercomparison Soil Building material Natural radionuclides |
| FundProject: |
| Author Name | Affiliation | E-mail | | TUO Fei | National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | XU Cui-hua | National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | xucuihua@nirp.cn | | ZHANG Jing | National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | ZHANG Qing | National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | LI Wen-hong | National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | |
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| Abstract:: |
| Objective To assess the accuracy and precision of γ-spectrometry analysis, and to obtain accurate and valid measurement results in the middle term and long term.Methods A nationwide intercomparison on gamma-ray spectrometry measurement of activity concentration of 226Ra,232Th and 40K in soil and building material was organized by National Institute for Radiological Protection (NIRP), China CDC.Results 15 laboratories participated in this intercomparison, with 13 laboratories produced acceptable results. Only 2 laboratories were classified as "not acceptable", including one for inappropriate accuracy in determination of 40K and another for inappropriate precision determination of 226Ra in both kinds of the samples. Through comment and discussion, the second round intercomparison got satisfactory results.Conclusions The overall measurement results of samples for intercomparison are in close agreement with the reference values. Most of the laboratories involved in the intercomparison have good ability in γ-spectrometry analysis. |
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