Pretreatment Technique for Environmental Tritium Analysis with Microwave Heating Method

• Project/Area Number: 26340032
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Risk sciences of radiation and chemicals
• Research Institution: National Institute for Fusion Science
• Principal Investigator: Akata Naofumi 核融合科学研究所, ヘリカル研究部, 准教授 (10715478)
• Co-Investigator(Kenkyū-buntansha): 高山 定次 核融合科学研究所, ヘリカル研究部, 准教授 (40435516)
• Co-Investigator(Renkei-kenkyūsha): Tanaka Masahiro 核融合科学研究所, 准教授 (00435520)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: tritium / microwave / FWT / OBT / トリチウム / 迅速化 / マイクロ波 / 核融合

Outline of Final Research Achievements

To understand the behavior of the combustion and drying of organic samples for tritium analysis, we conducted TG/DTA analysis of pine needle samples. Next, we tried the water recovery from fresh pine needle samples by the multi-mode microwave heating system. It was provided to good recovery yield achieved more than 97% under these experimental conditions.
We made a new microwave heating furnace based on the results of preliminary test. As the results, we were able to recover the FWT samples in a few hours. And we were able to be combusted organic matter in approximately 1 hour. And we were able to recover the OBT sample. FWT and OBT sample water contain no organic matter. Therefore, we can analyze directly without distillation. These result shows more preferable for the pretreatment of organic samples by microwave irradiation method than the conventional method.

Research Products

• [Journal Article] A simple method for sampling and analysis of particulate, inorganic gaseous and organic gaseous halogens in the atmosphere (2016)
  • Author(s): Akata, N., Tsukada, H., Takahashi, T., Fukutani, S.
  • Journal Title: Radiation Environment Medicine Volume: 5 Pages: 29-32
  • NAID: 40020922505
  • Peer Reviewed
• [Journal Article] A new pretreatment technique for environmental tritium analysis with microwave heating method (2016)
  • Author(s): Akata, N., Tanaka, M., Takayama, S., Kakiuchi, H., Tamari, T. and Sano, S.
  • Journal Title: Plasma and Fusion Research Volume: 11
  • NAID: 130005243516
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Long-term monitoring of tritium concentration in environmental water samples collected at Tono area, Japan (2016)
  • Author(s): Akata, N., Tanaka, M., Kato, H., Yamanishi, H., Kakiuchi, H., Hayashi, H., Miyake, H., Nishimura, K.
  • Journal Title: Plasma and Fusion Research Volume: 11
  • NAID: 130005311642
  • Peer Reviewed
• [Journal Article] 環境水試料の水素同位体測定法と雪氷研究への応用 (2015)
  • Author(s): 赤田尚史，田中将裕，池本憲弘，島長義，柿内秀樹，柳澤文孝
  • Journal Title: 東北の雪と生活 Volume: 30 Pages: 47-50
  • Acknowledgement Compliant
• [Journal Article] 天然レベルの環境水中トリチウム分析 (2015)
  • Author(s): 赤田尚史，柿内秀樹
  • Journal Title: 放地研特別寄稿シリーズ Volume: 106 Pages: 1-5
• [Journal Article] FWT and OBT concentration in pine needle samples collected at Toki, Japan (1998-2012) (2015)
  • Author(s): Akata, N., Kakiuchi, H., Tamari, T., Tanaka, M., Kawano, T., Miyake, H., Nishimura, K.
  • Journal Title: Radiation Protection Dosimetry Volume: - Issue: 1-3 Pages: 210-214
  • DOI: 10.1093/rpd/ncv246
  • Peer Reviewed
• [Journal Article] Behavior of magnetization in magnetic oxide compact sintered by magbetic and electric field of microwave irradiation (2015)
  • Author(s): Takayama, S., Sano, S., Sato, M.
  • Journal Title: Trans. Mat. Res. Sox.Japan Volume: 40 Pages: 65-68
  • Peer Reviewed
• [Presentation] 環境条件下における疎水性酸化触媒の分子状水素転換率評価 (2016)
  • Author(s): 池本憲弘，田中将裕，赤田尚史，佐瀬卓也，柿内秀樹
  • Organizer: 日本放射線安全管理学会第15回学術大会
  • Place of Presentation: 岡山市
  • Year and Date: 2016-11-30
• [Presentation] マイクロ波を応用したトリチウム分析の為の前処理法の開発 (2016)
  • Author(s): 高山定次，赤田尚史，田中将裕，佐野三郎
  • Organizer: 第10回日本電磁波エネルギー応用学会シンポジウム
  • Place of Presentation: 仙台市
  • Year and Date: 2016-10-13
• [Presentation] Tritium concentration and δD・δ18O composition of monthly precipitation collected at Toki, Japan (2016)
  • Author(s): Akata, N., Hasegawa, H., Sugihara, S., Tanaka, M., Furukawa, M., Kakiuchi, H.
  • Organizer: V. Terrestrial Radioisotopes in Environment International Conference on Environmental Protection
  • Place of Presentation: ベスプレーム，ハンガリー
  • Year and Date: 2016-05-17
  • Int'l Joint Research
• [Presentation] Concentration of tritium in precipitation and inland waters collected in Okinawa Island, southwestern part of Japan (2016)
  • Author(s): Furukawa, M., Ishizu, Y., Tsukayama, J., Ikemoto, N., Akata, N., Tanaka, M., Sanada, T.
  • Organizer: V. Terrestrial Radioisotopes in Environment International Conference on Environmental Protection
  • Place of Presentation: ベスプレーム，ハンガリー
  • Year and Date: 2016-05-17
  • Int'l Joint Research
• [Presentation] A new pretreatment technique for environmental tritium analysis with microwave heating method (2015)
  • Author(s): Akata, N., Tanaka, M., Takayama, S., Kakiuchi, H., Tamari, To and Sano, S.
  • Organizer: 25th International Toki Conference
  • Place of Presentation: セラトピア土岐
  • Year and Date: 2015-11-03
  • Int'l Joint Research
• [Presentation] 固体高分子膜電解濃縮装置におけるトリチウム分離係数の温度依存性 (2015)
  • Author(s): 池本憲弘，赤田尚史，田中将裕，島長義，柿内秀樹
  • Organizer: 日本保健物理学会第48回研究発表会
  • Place of Presentation: 首都大学東京
  • Year and Date: 2015-07-02
• [Presentation] 環境水試料の水素同位体測定法と雪氷研究への応用 (2015)
  • Author(s): 赤田尚史，田中将裕，池本憲弘，島長義，柿内秀樹，柳澤文孝
  • Organizer: 2015年度日本雪氷学会東北支部大会
  • Place of Presentation: 日本大学工学部
  • Year and Date: 2015-05-15 – 2015-05-16
• [Presentation] FWT and OBT concentration in pine needle samples collected at Toki, Japan (1998-2012) (2014)
  • Author(s): Akata, N., Kakiuchi, H., Tamari, T., Tanaka, M., Kawano, T., Miyake, H., Nishimura, K.
  • Organizer: The 9th International Symposium on the Natural Radiation Environment (NRE-IX)
  • Place of Presentation: 弘前キャッスルホテル
  • Year and Date: 2014-09-22 – 2014-09-26
• [Presentation] マイクロ波を利用した環境試料中トリチウムの分析前処理手法に関する基礎検討 (2014)
  • Author(s): 赤田尚史，高山定次，田中将裕，玉利俊哉，柿内秀樹，佐野三郎
  • Organizer: 2014日本放射化学会年会・第58回放射化学討論会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2014-09-11 – 2014-09-13