使用TEVA弹和ICP-MS/MS分析优化分离,以适用于热带土壤的大规模研究
Sophia M Dowell1,2, Thomas S Barlow1, Simon R Chenery1
1Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, NG12 5GG, UK. mwatts@bgs.ac.uk.
Analytical methods : advancing methods and applications
|August 16, 2023
概括
一种新方法简化了非洲土壤中的同位素分析,这对于了解土壤侵蚀至关重要. 这种具有成本效益的技术提高了低资源实验室环境监测的准确性和检测极限.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 核地质化学 核地质化学
背景情况:
- 在土壤中的 (Pu) 分析有助于了解全球土壤侵蚀.
- 热带土壤面临着独特的分析挑战,需要敏感的方法.
- 低资源的实验室需要具有成本效益和强大的分析方法.
研究的目的:
- 开发和验证一种最佳的分析方法,用于在非洲土壤中确定同位素.
- 为应对Pu分析的挑战,特别是在热带环境和低资源环境中.
- 提高PU同位素分析的灵敏度,减少干扰,提高成本效益.
主要方法:
- 使用TEVA列进行优化分离,以减少ICP-MS中的 (U) 干扰.
- 确定U和Pu的化配置,以提高分离效率和Pu回收.
- 在ICP-MS/MS模式中利用了O2气体,以使Pu同位素的质量转移远离干扰的U离子.
主要成果:
- 实现了对的增强选择性,降低了方法空白度,并提高了20%的吞吐量.
- 使用IAEA-384认证参考材料验证了该方法,显示高精度 (114±12对108±13 Bq kg−1).
- 对于239+240Pu,已证明低方法检测极限为0.18 pg kg−1,适用于超微量落差检测.
结论:
- 优化的方法对于分析非洲土壤中的同位素来说是简单,强大且具有成本效益的.
- 该技术适用于资源较少的实验室,有助于环境监测和土壤侵蚀研究.
- 开发的方法显著改善了超微量降落的检测.
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