Determination of technetium-99 and neptunium-237 in environmental samples by inductively coupled plasma mass spectrometry

Sumiya, Shuichi ; Morita, Shigemitsu; Tobita, Kazunori; Kurabayashi, Mizumi

New analytical techniques using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) were applied to the determination of technetium-99 (Tc-99) and neptunium-237 (Np-237) in environmental samples. The determination of Tc-99 consists of a cyclohexanone solvent extraction method to eliminate the interference isobar (Ru'99). An anion exchange with acetic acid media and a ITA-xylene solvent extraction were used for the determination of Np-237. Technetium-95m and Np-239 were used as chemical recovery tracers in these methods. The concentrations of Tc-99 and Np-237 in the typical surface soil samples in Japan ranged form 8.110 $^{-2}$ to 1.810 $^{-1}$ Bq/kg-dry, from 3.310 $^{-3}$ to 8.010 $^{-3}$ Bq/kg-dry, respectively.

Language	:	English
Journal	:	Journal of Radioanalytical and Nuclear Chemistry
Volume	:	177
Number	:	1
Pages	:	p.149 - 159
Publication Year/Month	:	1994/01
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Paper URL	:	https://doi.org/10.1007/BF02132419
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Registration No. : 08-1992-0130
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