Application of Inductively Coupled Plasma Mass Spectrometry to the Measurement of Long-Lived Radionuclides in Environmental Samples A Review

Yasuhito IGARASHI; Chang Kyu KIM; Yuichi TAKAKU; Kunio SHIRAISHI; Masayoshi YAMAMOTO; Nagao IKEDA

doi:10.2116/analsci.6.157

Yasuhito IGARASHI, Chang Kyu KIM, Yuichi TAKAKU, Kunio SHIRAISHI, Masayoshi YAMAMOTO, Nagao IKEDA

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Keywords: Inductively coupled plasma mass spectrometry, long-lived radionuclides, ²³²Th, ²³⁷Np, ²³⁸U, environmental samples, detection limits

JOURNAL FREE ACCESS

1990 Volume 6 Issue 2 Pages 157-164

DOI https://doi.org/10.2116/analsci.6.157

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Abstract

This review describes applications of inductively coupled plasma mass spectrometry (ICP-MS) to the determination of long-lived radionuclides in environmental samples. Simultaneous determination of ²³²Th and ²³⁸U in biological samples is described in detail; in this procedure an internal standard, Tl or Bi, is adopted for correction of the matrix effect. Determination of ²³⁷Np in soil samples by ICP-MS is also described. It is chemically separated to ensure no interference from matrix elements. The detection limits are several mBq (several pg) for the case of radionuclides having a half life of thirty or forty thousand years.

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