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Establishing of a rapid analytical method on uranium isotopic ratios for the environmental monitoring around nuclear facilities
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2018, v.31 no.3, pp.134-142
https://doi.org/10.5806/AST.2018.31.3.134
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(2018). Establishing of a rapid analytical method on uranium isotopic ratios for the environmental monitoring around nuclear facilities. Analytical Science and Technology, 31(3), 134-142, https://doi.org/10.5806/AST.2018.31.3.134
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Abstract
The uranium isotopic ratio in environmental samples around nuclear facilities is important because it reveals information regarding illegal activities or anthropogenic pollution. Determination of uranium isotopes, however, is a challenging task requiring much labor and time because of the complex separation procedures and lengthy process. In this study, a rapid determination method for uranium isotopes in environmental samples was developed using . The sample was completely decomposed using the alkali fusion method. The separation procedure using extraction chromatography (UTEVA) was simplified in a single step without any further removal process for Si and major matrix elements. The established method can be completed within 3 h from sample dissolution to ICP-MS measurement. Most matrix elements and uranium isotopes in the soil samples were well separated and purified. Five types of were used to assess the method’s accuracy and precision for a rapid uranium analysis method. The analytical accuracy for all CRM samples ranged from 95.1 % to 97.8 %, and the relative standard deviation was below 3.9 %. From the analytical results, one may draw conclusions that the evaluated method for uranium isotopes using alkali-fusion, the extraction chromatography process, and ICP-MS measurements is fast and fairly reliable owing to its recovering efficiencies. Thus, it is expected that the evaluated method can contribute to the improvement of environmental monitoring ability
- keywords
- uranium, rapid determination, environmental radioactivity, ICP-MS, alkali fusion
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