使用ICP-MS/MS在未分离的样本矩阵中快速分析Np和Pu同位素
Kirby P Hobbs1, Amanda D French1, Sean R Scott1
1Pacific Northwest National Laboratory, Richland, WA, 99352, USA.
Talanta
|February 4, 2025
概括
感应合等离子体双重质谱法 (ICP-MS/MS) 能够直接测量土壤中的海王星 (Np) 和 (Pu). 碰撞电池中的纯化氧化气显著提高了对动因子分析的灵敏度和干扰去除.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 核科学 核科学 核科学
背景情况:
- 准确的动因化物同位素测量对于核材料评估至关重要.
- 目前用于测量海王星和的现有方法可能很复杂.
- 感应合等离子体双重质谱 (ICP-MS/MS) 显示出直接分析的前景.
研究的目的:
- 调查ICP-MS/MS用于在未分离的土壤基质中直接量化 (Np) 和 (Pu).
- 优化在碰撞反应电池 (CRC) 中使用纯化的氧化 (NO),以提高灵敏度和减少干扰.
- 用标准参考材料验证方法.
主要方法:
- 在碰撞反应电池 (CRC) 中使用净化氧化 (NO) 的ICP-MS/MS.
- 研究了Th,Np,U,Pu,Am和Cm与NO的反应性.
- 缓解的化干扰到<3.85 x 10-11 .
- 在稀释土壤消化和标准参考材料中分析了237Np和238,239,240Pu.
主要成果:
- 净化NO提高了灵敏度,并允许更高的气流来消除干扰.
- 化干扰得到了有效的缓解.
- 在标准参考材料中证明了237Np和238,239,240Pu的准确测量.
- 验证了高精度的Pu测量,即使存在过量的U.
结论:
- 使用净化NO的ICP-MS/MS是一种可行的技术,用于在散土中直接量化Np和Pu.
- 该方法提供了更好的灵敏度和有效的干扰去除.
- 这种方法支持环境样本中核材料的可靠评估.
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