在水样中通过自动分离与直接ICP-MS/MS测量相结合来确定Pu的新策略
Youyi Ni1, Wenting Bu1, Ke Xiong1
1Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621999, China.
Talanta
|May 27, 2023
概括
一种新的自动化方法使用新型树脂和直接ICP-MS / MS测量精确地确定水中的超微量 (Pu),最大限度地减少劳动力和试剂. 这种技术实现了低检测极限,适用于环境监测和冰川研究.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 核化学 核化学 核化学
背景情况:
- 在水样中的传统 (Pu) 测定是劳动密集型的,需要手动操作.
- 现有的方法往往涉及繁的步骤,如共同沉,增加复杂性和试剂的使用.
研究的目的:
- 开发一种新的自动化策略,用于精确确定水样中的超微量.
- 为了提高效率,将全自动分离与直接的感应合等离子体并列质谱 (ICP-MS/MS) 测量相结合.
主要方法:
- 使用商用提取树脂 (TK200) 在高流量下从大水量 (高达1L) 中单列分离Pu.
- 实施了一种完全自动化的分离程序,与直接ICP-MS/MS分析兼容,最大限度地减少手工干预和样本处理.
- 通过ICP-MS/MS氧气反应模型实现了高污染 (10^410^5) 和最小化的干扰 (UH+/U+, UH2+/U+) 到10^-15.
主要成果:
- 该方法实现了低检测极限 (LOD):239Pu的0.32 μBq L^-1和240Pu的2.00 μBq L^-1.
- 与传统方法相比,证明了稳定的回收 (65%) 与最小化的劳动强度和试剂消耗相比.
- 在表面冰川样本中成功地用于确定全球沉降239+240Pu的低度.
结论:
- 开发的自动分离和ICP-MS/MS方法提供了精确,高效和灵敏的超微量在水中的测定.
- 该方法的低检测极限和对环境样本的适用性使其成为常规/紧急辐射监测和冰川年代研究的有希望的方法.
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