A rapid method was developed to analyze 237Np and Pu isotopes in steel and concrete samples using HCl–HNO3–NH4HF2 digestion, CaF2/LaF3 co-precipitation, AG MP-1 M resin column separation and SF-ICP-MS measurement. Compared to acid digestion using HCl–HNO3–HF, the whole procedure not only avoids the use of toxic HF, but can be completed within 1 day. The decontamination factor of U was estimated to be 1.1 × 106. The limits of detection of 237Np, 239Pu, and 240Pu were 0.25, 0.16, and 0.14 fg g−1, respectively, allowing method users to sufficiently detect low level Pu and Np in steel and concrete samples.
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This study was supported by the JSPS KAKENHI (JP 17K00537 and JP 21H03609), the Grant of Fukushima Prefecture related to research and development in radiological sciences, and ERAN I-21-24. Shuai Zhang thanks the China Scholarship Council for offering a scholarship (201906190116) to support his Ph. D. study
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Zhang, S., Yang, G., Zheng, J. et al. A simple acid digestion using HCl–HNO3−NH4HF2 for rapid SF-ICP-MS determination of 237Np and Pu isotopes in steel and concrete samples. J Radioanal Nucl Chem 329, 1083–1090 (2021). https://doi.org/10.1007/s10967-021-07825-6