Automatic separation technique of ultra-trace multi-elements as analytical tool for investigation of envrionmental variation

• Project/Area Number: 25340078
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental engineering and reduction of environmental burden
• Research Institution: Japan Atomic Energy Agency
• 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)
• 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)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥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)
• 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

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.

Research Products

• [Journal Article] Automatic sequential separation with an anion-exchange column for ultra-trace analysis of Pu, U, Th, Pb, and lanthanides in environmental samples (2016)
  • Author(s): Yutaka Miyamoto, Kenichiro Yasuda, Masaaki Magara
  • Journal Title: Journal of Radioanalytical and Nuclear Chemistry Volume: 印刷中 Issue: 1 Pages: 303-308
  • DOI: 10.1007/s10967-016-4837-y
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Pu を含む極微量多元素逐次分離法の開発とその応用 (2015)
  • Author(s): 宮本ユタカ、安田健一郎、間柄正明
  • Organizer: 2015日本放射化学年会・第59回放射化学討論会
  • Place of Presentation: 東北大学（宮城県・仙台市）
  • Year and Date: 2015-09-25
• [Presentation] Sequential separation of ultra-trace multi-elements with a single column (2015)
  • Author(s): Miyamoto Y, Yasuda K, Magara M
  • Organizer: International Conference on Nuclear Analytical Methods in the Life Sciences (NAMLS-11)
  • Place of Presentation: デルフト（オランダ）
  • Year and Date: 2015-08-23
  • Int'l Joint Research
• [Presentation] 環境試料の極微量多元素分離法の開発 (2015)
  • Author(s): 宮本ユタカ、安田健一郎、間柄正明
  • Organizer: 第16回「環境放射能」研究会
  • Place of Presentation: 高エネルギー研究開発機構（茨城県・つくば市）
  • Year and Date: 2015-03-09 – 2015-03-11
• [Presentation] Puを含む極微量多元素逐次分離法 (2014)
  • Author(s): 宮本ユタカ、安田健一郎、間柄正明
  • Organizer: 第58回放射化学討論会
  • Place of Presentation: 名古屋大学（愛知県・名古屋市）
  • Year and Date: 2014-09-11 – 2014-09-13
• [Presentation] Sequential separation of trace Pu, U and other elements in environmental samples (2014)
  • Author(s): 宮本ユタカ、安田健一郎、間柄正明
  • Organizer: 17th Radiochemical Conference (RadChem 2014)
  • Place of Presentation: Marianske Lazne（チェコ）
  • Year and Date: 2014-05-11 – 2014-05-16
• [Presentation] Puを含む極微量多元素同時分離 (2014)
  • Author(s): 宮本ユタカ、安田健一郎、間柄正明
  • Organizer: 第15回「環境放射能」研究会
  • Place of Presentation: 高エネルギー研究開発機構