Inter-comparison exercise for determination of 226Ra, 232Th and 40K in soil and building material |
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| Authors: | Fei Tuo Qing Zhang Jing Zhang Qiang Zhou Li Zhao Wenhong Li Jianfeng Zhang Cuihua Xu |
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| Institution: | 1. Studiecentrum voor Kernenergie, Boeretang 200, B-2400 Mol, Belgium;2. Ecoles des mines de Nantes, Rue Alfred Kastler 4, Nantes 44300, France;1. Division of Gastroenterology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA;2. Mount Sinai Medical Center, New York, New York, USA;3. Harvard Medical School/Massachusetts General Hospital, Boston, Massachusetts, USA;4. University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA;5. Dallas Veterans Affairs Medical Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA;6. Division of Biostatistics and Bioinformatics, Department of Oncology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA;7. Emory University School of Medicine/Emory University Hospital, Atlanta, Georgia, USA;8. Johannes Guttenberg University, Mainz, Germany;9. Department of Anatomic Pathology, Cleveland Clinic Foundation, Cleveland, Ohio, USA;10. Department of Pathology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA;1. Université de Toulouse, INSA-Toulouse, IMT UMR CNRS 5219, 135 avenue de Rangueil, F-31077 Toulouse Cedex 04, France;2. Université de Toulouse, INSA/UPS/ISAE/Mines Albi, ICA UMR CNRS 5312, 3 rue Caroline Aigle, 31400 Toulouse, France |
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| Abstract: | A nationwide inter-comparison exercise for the determination of activity concentration of 226Ra, 232Th and 40K in soil and building material was organized by the National Institute for Radiological Protection (NIRP), CDC, China. The primary purpose of this work was to assess the accuracy and precision of γ-spectrometry analyses. Activity concentrations of 226Ra, 232Th and 40K were determined by gamma-ray spectrometry in accordance with established inter-comparison procedures. A total of 15 laboratories participated in this programme. All participants reported their comparison results for a total of 87 data sets for three nuclides in soil and building material. The overall measurement results of samples for inter-comparison showed a good agreement with the reference values, with nearly 87% of the participants producing acceptable results. Some influential factors in measurement comparisons are also discussed in this paper on the basis of reported results. |
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