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<p>Conventional methods for determining neptunium-237 are labor-intensive and time-consuming, involving manual valence adjustments followed by chemical separation. These procedures are typically performed in open systems, which increases the risks of contamination, sample loss, and radiation exposure to workers. We developed a fully automated, semi-closed system that integrates flow electrolysis with solid-phase extraction and inductively coupled plasma-tandem mass spectrometry to address these limitations. The system achieved a detection limit of 3.6&#xa0;mBq/L (approximately 0.14&#xa0;ng/L) with a 1&#xa0;mL sample injection and a total analysis time of 25&#xa0;min, enabling high-throughput analysis. Recovery tests using steel waste samples showed good agreement with the spiked values.</p>

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Automated flow electrolysis coupled with solid-phase extraction and ICP-MS/MS for rapid determination of neptunium-237

  • 期刊论文

  • 发表日期：

    2025年12月5日

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  • Kayo Yanagisawa,
  • Makoto Matsueda,
  • Toshitaka Oka,
  • Yoshihiro Kitatsuji

摘要

Conventional methods for determining neptunium-237 are labor-intensive and time-consuming, involving manual valence adjustments followed by chemical separation. These procedures are typically performed in open systems, which increases the risks of contamination, sample loss, and radiation exposure to workers. We developed a fully automated, semi-closed system that integrates flow electrolysis with solid-phase extraction and inductively coupled plasma-tandem mass spectrometry to address these limitations. The system achieved a detection limit of 3.6 mBq/L (approximately 0.14 ng/L) with a 1 mL sample injection and a total analysis time of 25 min, enabling high-throughput analysis. Recovery tests using steel waste samples showed good agreement with the spiked values.