New determination method for iodine-129 in the environmental samples by using MIP-MS

Uezu, Yasuhiro; Nakano, Masanao ; Fujita, Hiroki; Watanabe, Hitoshi; Maruo, Yoshihiro; Shinohara, Kunihiko

Iodine-129 is an important radionuclide for environmental assessment, because it has a long half-life. A new analytical technique with Microwave Induced Plasma Mass Spectrometry (MIP-MS) was applied to the determination of iodine-129 ( $^{129}$ I) in the environmental samples. Environmental samples contain a large amount of matrices elements. Therefore, the interference elements were eliminated by ashing at 1000 $^{circ}$ C, and iodine was trapped by activated charcoal and finally extracted by tetramethylammonium hydroxide (TMAH). I-129 in the soil sample was also analyzed by conventional method [neutron activation analysis (NAA)] and MIP-MS method. The analytical data by MIP-MS and NAA methods showed excellent agreement.

Language	:	English
Journal	:	Proceedings of the International Workshop on Distribution and Speciation of Radionuclides in the Environment
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Pages	:	p.354 - 357
Publication Year/Month	:	2000/00
Meeting title	:	International workshop on distribution and speciation of radionuclides in the environment
Held date	:	2000/10
Location (city)	:	Rokkasho
Location (country)	:	Japan
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Keywords	:	no keyword
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Registration No. : 08-2000-0184
JAEA Abstracts No. :
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