在冰芯中进行超微量元素分析的ICP-TOF-MS的性能
Tatjana S Münster1,2,3, Theo M Jenk1,3, Anja Eichler1,3
1PSI Center for Energy and Environmental Sciences Villigen PSI Switzerland theo.jenk@psi.ch.
Journal of analytical atomic spectrometry
|October 27, 2025
概括
感应合的飞行质谱的等离子体时间 (ICP-TOF-MS) 显示了在冰芯中分析微量元素的卓越性能,为古气候研究和空气污染研究提供了新的可能性.
科学领域:
- 古气候学和环境科学 古气候学和环境科学
- 分析化学 分析化学
背景情况:
- 冰芯提供了关键的长期古环境记录,包括对理解生物地化学循环和空气污染至关重要的微量元素.
- 由于极低的度和混合溶解/颗粒形式,分析冰芯中的微量元素具有挑战性.
- 像ICP-SF-MS这样的既定方法是有效的,但耗时.
研究的目的:
- 评估一种新技术的性能,即导电合的飞行质谱的等离子体时间 (ICP-TOF-MS),用于冰芯的微量元素分析.
- 在灵敏度,精度和样本准备方面,将ICP-TOF-MS与已建立的ICP-SF-MS方法进行比较.
- 评估ICP-TOF-MS在冰芯样本中分析单个粒子的潜力.
主要方法:
- 在Colle Gnifetti和Cerro Negro的冰芯段上测试了ICP-TOF-MS的性能,杂质含量不同.
- 专注于优化样本准备用于微量元素分析.
- 将ICP-TOF-MS结果与ICP-SF-MS进行比较,以在23-238.8的质量范围内的灵敏度和精度.
主要成果:
- 对于大多数研究的微量元素 (质量范围23-238) ICP-TOF-MS表现出色.
- 由于质量干扰,该技术显示了45Sc的限制.
- ICP-TOF-MS的快速获取时间使单个粒子的同时分析成为可能.
结论:
- ICP-TOF-MS是冰芯研究中微量元素分析的一个非常有前途的技术.
- 它能够同时分析单个粒子的能力为古气候和污染研究提供了显著的优势.
- 可能需要进一步优化,以克服某些元素的特定质量干扰.
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