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A STUDY ON THE SAMPLE PREPARATION TECHNIQUES TO IMPROVE VARLATION ANALYSIS OF ENVIRONMENTAL RADIOACTIVITIES IN AOMORI PREFECTURE

Research Project

Project/Area Number 07680563
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, 工学部, 助教授 (40005476)

Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1997: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsEnvironmental Radioactivity / Liquid Scintillation Counting / Carbon 14 Dating / Rapid Sample Preparation Method / Tritium Concentration / Enrichment by Electrolysis / Solid Polymer Electrolytic Film / 液体シンチレーション計数装置 / トリチウム濃度計測 / 電解濃縮法 / 炭素14 / トリチウム / 環境水試料 / 青森県 / ベンゼン合成 / 液体シンチレーション計数法 / 環境試料
Research Abstract

I studied samoie preparation techniques to develop the variation analysis of the environmental radioactivities, ^<14>C and tritium.
In <@D114@>D1C dating, benzene is synthesized from collected samoles via severai chemical reactions.Since a great deal of efforts is required to the sample preparation, we proposed an another rapid process where the carbonized samples remples reacted to melted lithium metal directly to produze lithium zarbide .Although the yield generating acetylene gas from cardonized samoles was apparenyly low, 52.5(]SY.+-。[)1.5% on average, the yield synthesizing benzene from acetylene was 90% or more in the successive process.<@D114@>D1C ages for the samoles prepared by the conventional method were agreed to those for the same sample prepared by the converitional method within the age variation corresponding to the statistical error of 1o.Since this method does not contain combustion and the following carbonating process, the sample preparation is fairly shortened.This result has been publishrd on RADIOISOTOPES(vol.47, NO.3,1998).
Recently tritium concentrations in environmental water samples somples sometimes show a vaiue of 1 Bq/1 or lower which is near the detection limit of the scintillation counting system used.To measure low tritium concentration, we developed a tritium enrichment device which employs electrolysis using solid polymer electrolytic film.The obtained tritium recovery factor was 80% or more even at the water volume reduction factor of 10.This device will be used to enrich environmental water samples such as precipitation, coastal seawater and so on, after adding some improvements to the device.
Excepting above mentioned study, we have published a paper concerning to ^<14>C specific of farm products and marine products collected from the Rokkasho Area in Aomori prefecture.We have also reported on a conference about tritium concentrations in environmental waters samples collected from the east area of Aomori prefecture.

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] Muranaka Takeshi: "^<14>C Dating and ^<14>C Concentration Measurement of Environmental Samples in the Area of Aomori Prefecture" Proceeding of the 4^<th> Low Level Counting Conference Using Liquid Scintillation Analysis. 157-165 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Muranaka Takeshi: "^<14>C Ages of Buried Woods in Aomori Prefecture" Abstracts of TODAI International Symposium on Cosmochronology and Isotopes Geoscience. 173-176 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 村中 健: "青森県六ヶ所地区で採取した農産物、海産物の^<14>C比放射能" RADIOISOTOPES. 45巻. 246-248 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 村中 健: "青森県における環境水のトリチウム濃度測定" 八戸工業大学紀要. 16巻. 169-175 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 村中 健: "固体高分子電解質膜を用いたトリチウム電解濃縮器" 八戸工業大学紀要. 16巻. 177-182 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Muranaka Takeshi: "Tritium Concentration in Environmental Water Samples Collected from the Area in Aomori Prefecture" Proceeding of the 5^<th> Low Level Counting Conference Using Liquid Scintillation Analysis. 18-25 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本田 和也: "^<14>C年代測定のための試料処理法の改良" 八戸工業大学紀要. 17. 205-212 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 村中 健: "炭化試料とLi金属の直接反応を用いた^<14>年代測定のため試料迅速処理" RADIOISOTOPES. 47. 212-215 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Muranaka Takeshi: "^<14>C Dating and ^<14>C Concentration Measurement of Environmental Samples in the Area of Aomori Prefecture" Proceeding of the 4th Low Level Counting Conference Using. 157-165 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Muranaka Takeshi: "^<14>C Ages of Buried woods in Aomori Prefecture" Abstracts of TODAI International Symposium on Cosmochronolongy and Isotopes Geoscience. 173-176 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Muranaka Takeshi: "^<14>C Specific Activity of Farm Products and Marine Products Collected from the Rokkasho Area in Aomori Prefecture" RADIOISOTOPES. Vol.45, NO.4. 246-248 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Muranaka Takeshi: "Tritium Concentration Measurement of Environmental Water Samples in Aomori Prefecture" The Bulletin of Hachinohe Institute of Technology. 169-175 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Muranaka Takeshi: "Tritium Enrichment Device by Electrolysis Using Solid Polymer Electrolytic Film" The Bulletin of Hachinohe Institute of Technolong. Vol.16. 177-182 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Muranaka Takeshi: "Tritium Concentration in Environmental Water Samples Collected from the Area in Aomori Prefecture" Proceeding of the 5th Low Level Counting Conference Using Liquid Scintillation Analysis. 18-25 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Honda Kazuya: "Improvements on Sample Preparation Techniques for ^<14> CDating" The Bulletin of Hachinohe Institute of Technology. 17. 205-212 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Muranaka Takeshi: "Rapid Sample Preparation for ^<14>C Dating by Using Direct Reaction of Carbonized Sample and Lithium Metai" RADIOISOTOPES. Vol.47, NO.3. 212-215 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本田和也: "^<14>C年代測定のための試料処理法の改良" 八戸工業大学紀要. 17巻. 205-212 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 村中 健: "炭化試料とLi金属の直接反応を用いた^<14>C年代測定のための試料迅速処理" RADIOISOTOPES. 47巻. 212-215 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 村中健: "青森県における環境水のトリチウム濃度測定" 八戸工業大学紀要. 16. 169-175 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 村中健: "固体高分子電解質膜を用いたトリチウム電解濃縮器" 八戸工業大学紀要. 16. 177-182 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 本田和也: "_<14>C年代測定におけるLiカ-バイトを経由した試料化学処理" 応用物理学会東北支部第51回学術講演会予稿集. 39-40 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 本田和也: "_<14>C年代測定試料の化学処理収率の改善" 化学系7学協会連合東北地区大会講演予稿集. 47 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 村中健: "固体高分子電解質膜を用いた環境水中トリチウムの電解濃縮" 第33回理工学における同位元素研究発表要旨集. 6 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 村中健: "青森県内で採取した環境水のトリチウム濃度測定" 第5回液体シンチレーション法による低レベル測定の国際コンファレンス要旨集. 13-18 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 村中健: "青森県六ヵ所地区で採取した農産物、海産物の^<14>C比放射能" RADIOISOTOPES. 45. (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] T. Muranaka: "^<14>C AGES OF BURIED WOODS IN AOMORI PREFECTURE" ABSTRACTS OF TODAI INTERNATIONAL SYMPOSIUM ON COSMOCHRONOLOGY AND ISOTOPE GEOSCIENCE. 173-176 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] T. Muranaka: "^<14>C DATING AND ^<14>C CONCENTRATRION OF ENVIRONMENTAL SAMPLES IN THE AREA OF AOMORI PREFECTURE" Proceeding of the 4th Low Level Counting Conference Using Liquid Scintillation Analysis. 157-165 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 村中健: "^<14>C年代測定における試料化学処理法の改良" 応用物理学会東北支部第50回学術講演会予稿集. 121-122 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 村中健: "SPE膜を用いた環境水中トリチウムの電解濃縮" 化学系7学協会連合東北地区大会講演予稿集. 200- (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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