快速方法通过SF-ICP-MS在海水中确定Cs,Np和Pu同位素137的快速方法
Shuai Zhang1,2, Zhiyong Liu1,3, Guosheng Yang1
1Institute of Radiological Sciences, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage , Chiba 263-8555, Japan.
Analytical chemistry
|October 31, 2023
概括
一种新方法准确地测量海水中的海-237 (Np-237) 和-137 (Cs-137),这对于跟踪海洋流和评估福岛废水对环境的影响至关重要.
科学领域:
- 环境科学 环境科学
- 放射化学 放射化学是指辐射化学.
- 海洋学 海洋学 海洋学
背景情况:
- 海王星-237 (Np-237) 是一种长寿命的放射性核化物,有可能用于海洋学研究.
- 在海水中精确测量Np-237是具有挑战性的,但对于环境监测至关重要.
研究的目的:
- 开发和验证一种新的分析方法,用于确定海水中的NP-237,Cs-137和Pu同位素.
- 评估NP-237作为长期海洋学研究的标记物的适用性.
- 测量福岛废水排放场附近的太平洋海水中的NP-237活动.
主要方法:
- 使用氨聚酸盐 (AMP) 吸附分离Cs-137的分离.
- 使用离子交换染色学分离Np-237和Pu同位素.
- 测量Cs-137通过马光谱学和NP-237/Pu同位素通过SF-ICP-MS,使用Pu-242作为Np的标记物.
主要成果:
- 该方法实现了高化学产量 (65-88%) 和优异的除污染 (>10^6).
- 低方法检测极限 (MDL) 已为NP-237和Pu同位素建立.
- 在福岛附近的太平洋海水中首次报告Np-237活动度 (0.122-0.154 μBq L-1).
结论:
- 开发的方法可用于海水中的NP-237和Cs-137分析,适用于环境监测.
- 作为海洋大质量循环研究的长期追踪器,NP-237显示出前景.
- 这些发现为评估福岛净化废水排放对环境的影响提供了基线数据.
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