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<p>Organically bound tritium (OBT) analysis by liquid scintillation counter measurement requires combustion to release OBT; however, the combustion process presents several challenges. In this study, we optimized the combustion process for OBT analysis using a semi-automatic system with a temperature-programmable electric furnace. A 5&#xa0;cm-diameter quartz tube was used to accommodate large sample volumes, and a honeycomb catalyst was placed downstream in the tube to ensure complete oxidation of combustion gases. To validate the optimized system, we conducted a comparative experiment using a pine needle standard reference material, and the measured OBT values showed good agreement with the reported values.</p>

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Optimization and validation of combustion-based analysis of organically bound tritium in pine needles

  • 期刊论文

  • 发表日期：

    2025年3月25日

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  • Haruka Kuwata,
  • Khemruthai Kheamsiri,
  • Ryohei Yamada,
  • Toshiya Tamari,
  • Hideki Kakiuchi,
  • Masahiro Tanaka,
  • Naofumi Akata

摘要

Organically bound tritium (OBT) analysis by liquid scintillation counter measurement requires combustion to release OBT; however, the combustion process presents several challenges. In this study, we optimized the combustion process for OBT analysis using a semi-automatic system with a temperature-programmable electric furnace. A 5 cm-diameter quartz tube was used to accommodate large sample volumes, and a honeycomb catalyst was placed downstream in the tube to ensure complete oxidation of combustion gases. To validate the optimized system, we conducted a comparative experiment using a pine needle standard reference material, and the measured OBT values showed good agreement with the reported values.