基于燃烧的样本引入系统的开发和初步评估,用于通过多采集器ICP质谱仪在固体样本中直接对进行同位素分析
Eduardo Bolea-Fernandez1, Ana Rua-Ibarz1, Jorge Alves Anjos1
1Ghent University, Department of Chemistry, Atomic & Mass Spectrometry - A&MS Research Group, Campus Sterre, Krijgslaan 281-S12, 9000, Ghent, Belgium.
Talanta
|May 10, 2024
概括
高精度 (Hg) 同位素分析现在可以用于固体样本,使用修改后的分析仪与多采集器感应联等离子体质谱学 (MC-ICP-MS) 相结合. 这种方法提高了吞吐量,适用于低度样品.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 地质化学 地质化学
背景情况:
- 使用多采集器感应合等离子体质谱法 (MC-ICP-MS) 的 (Hg) 同位素分析为的来源,通路和沉降提供了关键的见解.
- 传统方法往往需要样品消化和稀释,限制吞吐量和适用于低度样品.
研究的目的:
- 开发和验证使用MC-ICP-MS在固体样本中进行直接,高精度的同位素分析的方法.
- 修改商用分析仪,同时进行同位素分析和量化,而不会影响性能.
主要方法:
- 一台商用分析仪被修改为通过MC-ICP-MS直接进行固体样本分析.
- 蒸汽与 (Tl) 气溶混合,用于湿等离子体条件和内部标准化.
- 使用水性标准 (NIST SRM 3133) 纠正了仪器质量歧视.
主要成果:
- 经过修改的系统实现了准确和精确的同位素测量 (δ\[202]Hg:0.10 ‰ 2SD) 的内部标准.
- 通过对固体认证参考材料 (BCR CRM 464 鱼,NRC-CNRC TORT-3 龙肝) 的成功分析,该方法得到了验证.
- 准确的质量差异纠正不需要矩阵匹配.
结论:
- 这种新的设置允许使用MC-ICP-MS对固体样本进行直接,高精度的同位素分析.
- 这一进步显著提高了样品吞吐量,适用于少量或低度样品.
- 该方法保留了通过冷蒸汽原子吸收光谱法 (CVAAS) 同时量化的能力.
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