Determination of the chemical forms of iodine with IC-ICP-MS and its application to environmental samples |
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| Authors: | S. Yoshida Y. Muramatsu S. Katou H. Sekimoto |
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| Affiliation: | (1) National Institute of Radiological Sciences, Anagawa 4-9-1, Inage-ku, Chiba 263-8555, Japan;(2) Gakushuin University, Mejiro 1-5-1, Toshima-ku, Tokyo 171-8588, Japan;(3) Utsunomiya University, Minemachi 350, Utsunomiya-shi, Tochigi 321-8505, Japan |
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| Abstract: | An online analytical system using ion chromatography (IC) followed by inductively coupled plasma mass spectrometry (ICP-MS) was developed for the separate determination of I− and IO3− in aqueous solutions with a detection limit 0.1–1 μg 1/1. The total iodine concentration was also directly determined by ICP-MS. Iodine in several environmental samples (i.e., rain, river water, brine, and soil solution) was successfully determined with information on its chemical form. The release of I− into soil solution with decreasing Eh was observed in an incubation experiment with flooded soil. An iodine form other than I− and IO3− was observed in several environmental samples. |
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