Simplification of oxygen combustion process in OBT analysis

迅速試料燃焼装置を用いたOBT分析の前処理の簡素化

藤原 健壮 ; 桑田 遥*; 御園生 敏治   ; 飯島 和毅  

Fujiwara, Kenso; Kuwata, Haruka*; Misono, Toshiharu; Iijima, Kazuki

環境中のトリチウムの影響評価に際しては、被ばく上より重要な有機結合型トリチウム(OBT)の濃度評価が必要である。しかし、従来のOBT分析法では前処理に時間がかかることから、原子力機構福島環境安全センターでは、時間短縮のため、凍結乾燥と加温乾燥を組み合わせた手法を確立した。本発表では、更なる迅速化・精度向上等を目的として、魚種, サンプル処理量等の影響と、それに基づく簡素化の有効性の確認結果を報告する。

Since various radionuclides including tritium was released into the ocean by the Fukushima Dai-ichi Nuclear Power Station accident, transfer of those to marine products has been concerned. In case of tritium, Organically Bound Tritium (OBT) was considered to be relatively important for the transfer due to its longer biological half-life. However, huge sequential treatment processes and a few weeks are needed to measure the concentration of each type of tritium. Therefore, simplification of the processes and reduction of the duration were required for the purpose of rapid analysis and obtaining more data on environmental monitoring.