2025-12-22 日本原子力研究機構
図1 開発した237Np自動分析システムの概念図
＜関連情報＞
- https://www.jaea.go.jp/02/press2025/p25122201/
- https://link.springer.com/article/10.1007/s10967-025-10607-z
固相抽出とICP-MS/MSを組み合わせた自動フロー電気分解によるネプツニウム237の迅速定量 Automated flow electrolysis coupled with solid-phase extraction and ICP-MS/MS for rapid determination of neptunium-237
Kayo Yanagisawa,Makoto Matsueda,Toshitaka Oka & Yoshihiro Kitatsuji
Journal of Radioanalytical and Nuclear Chemistry Published:05 December 2025
DOI:https://doi.org/10.1007/s10967-025-10607-z
Abstract
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.
