| Project/Area Number |
25340078
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Environmental engineering and reduction of environmental burden
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
Miyamoto Yutaka 国立研究開発法人日本原子力研究開発機構, 安全研究・防災支援部門 安全研究センター, 研究主幹 (60219821)
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| Co-Investigator(Renkei-kenkyūsha) |
YASUDA Kenichiro 国立研究開発法人日本原子力研究開発機構, 安全研究・防災支援部門 安全研究センター, 技術副主幹 (20354871)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 極微量分析 / イオン交換分離法 / プルトニウム / 逐次分離 / 年輪試料 / ウラン / 同位体比分析 |
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| Outline of Final Research Achievements |
The objective of this study is to develop an automatic separation technique of ultra-trace elements including U, Pu, Th, Pb, and lanthanides in order to investigate chronological information regarding anthropogenic events by analysing elemental abundances and isotopic composition in a tree-ring sample. The best chemical composition of eluents for the sequential separation was optimized in order to completely separate each element of interest including Pu. This anion-exchange chromatographic procedure using an automatic system with a small column allows the sequential separation of objective elements with high recoveries (>93%) for 6.3 h. This high performance system was applied to measure abundance and isotopic ratio of the objective elements extracted from some pine tree-ring samples. High separation performance was confirmed by analyzing the abundance of objective elements ranging from 0.09 ng/g of U to 0.21 μg/g of Pb in the tree ring samples.
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