質量分析法による環境試料中のヨウ素-129定量法の開発

植頭 康裕; 森田 重光; 中野 政尚; 渡辺 均; 片桐 裕実

doi:10.3769/radioisotopes.49.136

Analytical Method Developed for Determination of Iodine-129 in Environmental Samples by Means of MIP-MS

Yasuhiro UEZU, Shigemitsu MORITA, Masanao NAKANO, Hitoshi WATANABE, Hiromi KATAGIRI

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Keywords: iodine-129, environmental sample, microwave induced plasma mass spectrometer, atomic ratio

JOURNAL FREE ACCESS

2000 Volume 49 Issue 3 Pages 136-139

DOI https://doi.org/10.3769/radioisotopes.49.136

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Abstract

Iodine-129 is an important radionuclide for environmental assessment, because it has a long halflife.
A new analytical technique using Microwave Induced Plasma Mass Spectrometry (MIP-MS) was applied to the determination of iodine-129 in environmental samples. In environmental samples, a large amount of matrix elements is present. Therefore, the matrix elements were eliminated by ashing at 1000°C, and iodine was trapped by activated charcoal and finally extracted by tetramethylammonium hydroxide.
A soil sample was analyzed by neutron activation analysis as well as MIP-MS method. Excellent agreement resulted.

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