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ICP-MS analysis of actinides in radioecological studies
https://repo.qst.go.jp/records/63164
https://repo.qst.go.jp/records/63164b0dda4ac-7ff3-429a-90d7-3df1edc3fdbf
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2009-07-21 | |||||
| タイトル | ||||||
| タイトル | ICP-MS analysis of actinides in radioecological studies | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Zheng, Jian
× Zheng, Jian× Yamada, Masatoshi× Aono, Tatsuo× Yoshida, Satoshi× Tagami, Keiko× Uchida, Shigeo× 鄭 建× 山田 正俊× 青野 辰雄× 吉田 聡× 田上 恵子× 内田 滋夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | There has been an increasing interest in the distribution and fate of natural and artificial radionuclides in the environment due to the resurgence of interest in nuclear power to deal with the global warming problem. Their existence and accumulation in the environment raises an irradiation threat to human health. On the other hand, radionuclides have served as geochemical tracers for the study of fundamental environmental issues, such as water mass movement, particle scavenging, sediment mixing processes, soil erosion and desertification. In this work, we present our recent studies on the development of ICP-MS based analytical techniques for ultra-trace analysis of actinides (Pu isotopes and 241Am) in various environmental samples (seawater, sediment, settling particle and soil). Using a sector-field ICP-MS combined with a high-efficiency sample introduction system, we achieved an extremely high sensitivity for Pu and 241Am, which is ca. 400 times higher than that of quadrupole ICP-MS. For the first time, the determination of Pu atom ratio at femtogram levels in small marine settling particles was achieved. Although ICP-MS has been widely used for the determination of long-lived radionuclides in environmental samples, due to its short half-life, the determination of 241Am (t1/2 = 433 y) in low-level environmental samples by ICP-MS is a challenging task. Here we report a rapid, simple analytical method for determining 241Am in sediment and soil samples using a selective CaF2 co-precipitation-extraction chromatography separation and purification procedure followed by the ICP-MS analysis. Excellent detection limit (0.041 mBq/g), which is better than that of alpha spectrometry was achieved. The developed method was applied to the study of 241Am vertical distribution in marine sediments in Sagami Bay to understand the major processes controlling the deposition of Pu and 241Am, and to the investigation of the current status of 241Am concentrations in surface soils of Nagasaki, Japan. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The Fifth International Symposium on Radiation Safety and Detection Technology (ISORD-5) | |||||
| 発表年月日 | ||||||
| 日付 | 2009-07-17 | |||||
| 日付タイプ | Issued | |||||
