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A STUDY ON THE SAMPLE PREPARATION TECHNIQUES TO IMPROVE VARIATION ANALYSIS OF HYDROGEN AND CARBON ISOTOPES IN ENVIRONMENT

Research Project

Project/Area Number 13680609
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionHachinohe Institute of Technology

Principal Investigator

MURANAKA Takeshi  HACHINOHE INSTITUTE OF TECHNOLOGY, FACULTY OF ENGINEERING, PROFESSOR, 工学部, 教授 (40005476)

Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2002: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2001: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsENVIRONMENTAL WATER / TRITIUM / ELECTROLYTIC ENRICHMENT / DEUTERIUM / CARBON 14 / SAMPLE PREPARATION / PRECIPITATION / HYDROGEN STABLE ISOTOPE RATIO / 放射性炭素 / タンポポ / 八戸地域 / 電界濃縮 / dead carbon / 炭素同位体分別補正 / ^<14>C年代測定
Research Abstract

We studied sample preparation techniques to develop variation analysis of hydrogen and carbon isotopes in environment. Obtained results are as follows.
1. To measure low tritium concentration in environmental water samples, it is indispensables to enrich them by electrolysis. We enriched water samples connected a sample cell and a standard cell in series and calculated tritium concentration of the sample measuring an apparatus constant k or a recovery factor R in the standard cell as well as tritium concentration after electrolysis and so on in the sample cell. It was demonstrated that these two methods were equally effective to estimate tritium concentration in environmental water samples. This result has been reported in 6th international conference on tritium science and technology, held at Tsukuba, 2001.
2. Since it takes much time for chemical preparation of ^<14>C samples, only two samples can be prepared in one week by a conventional process. We therefore divided the chemical proc … More ess into three divisions such as a device to activate vanadium catalysis, an electric furnace to form lithium carbide and acetylene-benzene preparation apparatus. As the result, we could have an ability of preparing four ^<14>C samples in a week, if we operate the three processes simultaneously.
3. Recently it is desirable for ^<14>C ages to correct the fractionation effect of carbon isotopes and also to calibrate them to calendar year. We reported some examples applied to charcoal samples on the bulletin of Hachinohe Institute of Technology, Vol. 21, 2002.
4. We investigate ^<14>C concentration in the leaves of Dandelion growing in some locations of Hachinohe area where traffic circumstances are differ from one another and confirmed that ^<14>C concentrations of Dandelion correspond to the local traffic conditions.
5. We studied hydrogen stable isotope ratio, δD in every precipitation samples collected on the campus in Hachinohe Institute of Technology from Jan. 2000 to Dec. 2001. We found the seasonal variation of δD and interpreted the variation by three factors, that is, temperature effect of "yamase" and the growing location of precipitation. Less

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] 伊達元成, 村中 健: "生育環境によるタンポポの^<14>C濃度変化"八戸工業大学異分野融合科学研究所紀要. 第1巻. 97-102 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 工藤久佳, 村中 健: "八戸地域で採取した降水の水素安定同位体比"八戸工業大学異分野融合科学研究所紀要. 第1巻. 103-105 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 島 長義, 村中 健: "2槽直列電解濃縮における環境水試料のトリチウム濃度算出法"八戸工業大学異分野融合科学研究所紀要. 第1巻. 107-112 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 津幡圭介, 伊達元成, 村中 健: "^<14>C年代測定における試料処理の効率化"八戸工業大学紀要. 第21巻. 349-352 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 村中 健: "^<14>C年代の炭素同位体分別補正および暦年代への較正"八戸工業大学紀要. 第21巻. 353-356 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takeshi Muranaka et al.: "ELECTROLYTIC ENRICHMENT FACTOR OF DEUTERIUM TO ESTIMATE TRITIUM CONCENTRATION IN WATER SAMPLES"Abstracts of 6th International Conference on Tritium Science and Technology. 65 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Motoshige Date: "The Variation of ^<14>C Concentration in Dandelion Depending on the Growing Environment"The Bulletin of Research Institute for Interdisciplinary Science Hachinohe Institute of Technology. Vol. 1. 97-102 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hisayoshi Kudo: "Hydrogen Stable Isotope Ratio in Precipitation Samples Collected on the Campus in Hachinohe Institute of Technology"The Bulletin of Research Institute for Interdisciplinary Science Hachinohe Institute of Technology. Vol. 1. 103-105 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nagayoshi Sima: "Estimation Methods of Tritium Concentration in Environmental Water Samples for an Electrolytic Enrichment Operation Connected Two Cells in Series"The Bulletin of Research Institute for Interdisciplinary Science Hachinohe Institute of Technology. Vol. 1. 107-112 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Keisuke Tubata: "The Development of Sample Preparation Techniques for 14C Dating"The Bulletin of Hachinohe Institute of Technology. Vol. 21. 349-352 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takeshi Muranaka: "The Correction of ^<14>C Ages for the Fractionation Effect of Carbon Isotopes and the Calibration of ^<14>C Ages to Calendar Year"The Bulletin of Hachinohe Institute of Technology. Vol. 21. 353-355 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takeshi Muranaka: "ELECTROLYTIC ENRICHMENT FACTOR OF DEUTERIUM TO ESTIMATE TRITIUM CONCENTRATION IN WATER SAMPLES"Abstracts of 6th International Conference on Tritium Science and Technology. 65. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 島 長義, 村中 健: "環境水中トリチウムの電解濃縮"日本機械学会東北支部八戸地方講演会講演論文集. No.012-2. 203-204 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 工藤久佳, 村中 健: "八戸地域で採取した降水のδD、pHの特徴"2002年度日本地球化学会第49回年会講演要旨集. 141 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 島 長義, 村中 健: "2槽直列電解濃縮における装置定数に着目した水試料中トリチウム濃度の算出"応用物理学会東北支部第57回学術講演会講演予稿集. 126-127 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 伊達元成, 村中 健: "生育環境によるタンポポの^<14>C濃度変化"八戸工業大学異分野融合科学研究所紀要. 第1巻. 97-102 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 工藤久佳, 村中 健: "八戸工業大学構内で採取した降水の水素安定同位体比"八戸工業大学異分野融合科学研究所紀要. 第1巻. 103-105 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 島 長義, 村中 健: "2槽直列電解濃縮法における環境水試料のトリチウム濃度算出法"八戸工業大学異分野融合科学研究所紀要. 第1巻. 107-112 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 工藤久佳, 於本大輔, 村中 健: "八戸地方で採取した降水のδDとpHの相関"第38回理工学における同位元素・放射線研究発表会要旨集. 108 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 伊達元成, 腰原毅史, 津幡圭介, 村中 健: "環境試料の^<14>C比放射能に対するdead carbonの影響"第38回理工学における同位元素・放射線研究発表会要旨集. 138 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Takeshi Muranaka et al.: "ELECTROLYTIC ENRICHMENT FACTOR OF DEUTERIUM TO ESTIMATE TRITIUM ONCENTRATION IN WATER SAMPLES"Abstracts of 6^<th> International Conference on Tritium Science and Technology. 65 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 津幡圭介, 伊達元成, 村中 健: "^<14>C年代測定における試料処理の効率化"八戸工業大学紀要. 21. 349-352 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 村中 健: "^<14>C年代の炭素同位体分別補正および暦年代への較正"八戸工業大学紀要. 21. 353-356 (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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