在环境条件下使用化物生成微波等离子火质谱法对Sb进行敏感和同位素无干扰分析
Tong Shi1, Zhengbing Zhou2, Ziyang Tang1
1Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Guanglan Avenue 418, 330013, Nanchang, PR China.
Talanta
|July 21, 2024
概括
使用化物生成微波等离子体火质谱法 (HG-MPT-MS) 的新方法提供了灵敏且无干扰的反分析. 这种技术有效消除同位素干扰,使环境和生物化学研究能够精确确定同位素比率.
科学领域:
- 分析化学 分析化学
- 环境科学 环境科学
- 地质化学 地质化学
背景情况:
- 准确的反 (Sb) 分析对于了解其环境和生化行为至关重要.
- 像ICP-MS这样的传统方法可能会遭受同位素干扰,使Sb分析复杂化.
- 微波等离子火 (MPT) 与离子陷质谱仪相结合,提供了"更柔软"的电离和减少干扰的潜力.
研究的目的:
- 为 (Sb) 开发一种敏感和同位素无干扰的分析方法.
- 评估化物生成微波等离子体火质谱学 (HG-MPT-MS) 的性能,用于Sb分析和同位素比率的确定.
- 为了证明HG-MPT-MS在环境样本中研究Sb的多功能性.
主要方法:
- 化物生成与微波等离子体火质谱学 (HG-MPT-MS) 相结合.
- 优化毛细血管电压和管透镜电压,以控制离子形成和消除干扰.
- 在土壤样本中分析Sb同位素比率 (例如123Sb/121Sb) 和量化.
主要成果:
- HG-MPT-MS提供了0.05μg/L的Sb的敏感检测,与ICP-MS和HG-AFS相似.
- 通过优化MPT参数,有效消除了同位素干扰,例如123Te在123Sb上.
- 确定了精确的Sb同位素比率,土壤样本中的峰值回收率在90-100%之间,证明了方法的可靠性.
结论:
- HG-MPT-MS是一种多功能和高效的工具,用于敏感的抗氧化分析和同位素比率的确定.
- 该方法能够消除同位素干扰并在环境条件下运行,这简化了对Sb生物化学和地化学行为的研究.
- 这种技术对分析其他化物形成元素具有更高的准确性和效率具有前景.
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