Comparisons of soil pretreatment methods for SF-ICP-MS determination of ultra-trace level plutonium in water soluble and exchangeable fractions
In this study, we developed a method to evaluate the potentially bioavailable fraction of Pu in agricultural soils by determining their water soluble and exchangeable fractions. Three commonly used pretreatment methods were compared for their ability and performances to process the extracted solutions. Results showed that these three methods were able to obtain consistent Pu concentration results; however, based on the experimental performance factors, we considered that wet-ashing followed by Fe(OH)3 co-precipitation was the best pretreatment method, with which high 242Pu recoveries for the overall process were realized for the water soluble fraction (69.8%) and the exchangeable fraction (70.6%).
KeywordsPu Bioavailability Fe(OH)3 co-precipitation Wet-ashing Total digestion
This work was partially supported by the Agency for Natural Resources and Energy, the Ministry of Economy, Trade and Industry (METI), Japan, and the Grant of Fukushima Prefecture Related to Research and Development in Radiological Sciences. Youyi Ni thanks the China Scholarship Council for offering a scholarship (201606010056) to support his Ph.D. study.
- 1.United Nations Scientific Committee on the Effects of Atomic Radiation (2000), Sources and Effects of Ionizing Radiation. Report to the General Assembly, with Scientific Annexes, I, United Nations, New YorkGoogle Scholar
- 4.International Atomic Energy Agency (1973) Safe Handling of Radionuclides. Safety series, 1, ViennaGoogle Scholar
- 23.Komosa A, Orzel J, Michalik S (2007) Study on plutonium distribution between sequentially extracted phases of arable soils. IAEA-CN-145/114PGoogle Scholar
- 26.National Institute of Radiological Sciences (2010) Report on Biospheric Assessment for Waste Disposal (in Japanese)Google Scholar
- 28.Sohrin Y, Isshiki K (2005) Co-precipitation, in Chemistry of Sea and Lake. Part II. Analytical chemistry of trace elements in hydrosphere (in Japanese). Kyoto University Press, Kyoto, JapanGoogle Scholar