放射性核酸的流电解分离用于抑制g-光谱学中的干扰
Paul Dutheil1, Martin Heule2, Fabian Köhler2
1Department of Chemistry and Applied Biosciences, Laboratory of Inorganic Chemistry, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, Zürich, CH-8093, Switzerland; Department of Radiation Safety and Security, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland.
Analytica chimica acta
|January 12, 2025
概括
流电解有效地将核样本中的低水平放射性同位素分离出来,提高了玛光谱的准确性和检测极限. 这种方法通过减少主导放射性核素的干扰来增强具有挑战性的样本的分析.
科学领域:
- 核分析化学 核分析化学
- 电化学 电化学 电化学
- 放射化学 放射化学是指辐射化学.
背景情况:
- 在核设施中测量低水平马辐射器是很困难的,因为主导放射性核素的高背景辐射.
- 复杂的化学分离通常需要在马光谱测量之前去除干扰同位素.
- 像银-110m (Ag),-124/125 (Sb),锡-113 (Sn) 和-123m (Te) 这样的关键放射性核酸需要精确的测量.
研究的目的:
- 开发和实施流电解用于放射性核素的分析前分离.
- 为了抑制干扰放射性核素和改善马光谱测量.
- 为了提高低水平放射性分析的精度和降低检测极限.
主要方法:
- 使用电压测量对不活跃的Ag,Sb,Sn和Te进行表征.
- 使用定制制造的电化学流通电池进行选择性电沉积和剥离.
- 优化应用潜力,以有效地分离稳定元素和放射性痕迹物.
主要成果:
- 优化的流电解程序证明了稳定元素的有效分离.
- 对放射性痕迹和核设施样本的应用显著降低了玛光谱中的不确定性和检测极限 (大小为一个数量级).
- 改进了低水平Te的确定和以前未被检测到的Ru和Ag的识别.
结论:
- 将流电解与玛光谱学相结合,为分析复杂矩阵中低水平放射性核素提供了显著的优势.
- 与传统方法相比,这种方法提供了独特的化学选择性.
- 流电解可以与其他技术相结合,如液体闪计数,α光谱,离子交换或提取色谱.
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