Pretreatment technique of environmental and bioassay sample for radioactivity analysis using supercritical water reaction

Nagaoka, Mika ; Fujita, Hiroki; Aida, Taku*; Smith, R.*

The conventional pretreatment of radioactive nuclides of beta-ray emitters ( $^{90}$ Sr) and alpha-ray sources (U, $^{238}$ Pu, $^{239,240}$ Pu, $^{241}$ Am) in the environmental and bioassay samples is performed with much chemical regents to mineralize of organic matters and extract target nuclides. The mineralization of organic matter is both time-consuming and inefficient and it requires a large quantity of acid reagents that are toxic. On the other hand, supercritical water (SCW) can decompose organic matters without chemical regents. Therefore, in this research, the SCW was applied for decomposition of environmental and bioassay samples.

Language	:	English
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Meeting title	:	64th Annual Radiobioassay and Radiochemical Measurements Conference (RRMC 2019)
Held date	:	2019/10
Location (city)	:	Santa Fe
Location (country)	:	U.S.A.
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Keywords	:	環境試料; バイオアッセイ; 超臨界水
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Registration No. : BB20190939
JAEA Abstracts No. :
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