Improved sample preparation method for environmental plutonium analysis by ICP-SFMS and alpha-spectrometry |
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| Authors: | Z. Varga G. Surányi N. Vajda Z. Stefánka |
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| Affiliation: | (1) Institute of Isotopes, Hungarian Academy of Sciences, Konkoly-Thege utca 29-33, H-1121 Budapest, Hungary;(2) Research Group of Geophysics and Environmental Physics, Hungarian Academy of Sciences, Pázmány Péter sétány 1/C, H-1117 Budapest, Hungary;(3) Radiochemistry Laboratory, Institute of Nuclear Techniques, Budapest University of Technology and Economics, H-1521 Budapest, Hungary |
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| Abstract: | A rapid and simple sample preparation method for plutonium determination in environmental samples by inductively coupled plasma sector field mass spectrometry (ICP-SFMS) and alpha-spectrometry is described. The developed procedure involves a selective CaF2 co-precipitation for preconcentration followed by extraction chromatographic separation. The proposed method effectively eliminates the possible interferences in mass spectrometric analysis and also removes interfering radionuclides that may disturb alpha-spectrometric measurement. For 239Pu, 240Pu and 241Pu limits of detection of 9.0 fg·g−1 (0.021 mBq), 1.7 fg·g−1 (0.014 mBq) and 3.1 fg·g−1 (11.9 mBq) were achieved by ICP-SFMS, respectively, and 0.02 mBq by alpha-spectrometry. Results of certified reference materials agreed well with the recommended values. |
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