实验调查一个数字四极 induktively 合的等离子体质谱仪用于元素分析
Rui Hu1, Alexander Gundlach-Graham1
1Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States.
Journal of the American Society for Mass Spectrometry
|July 15, 2024
概括
这项研究引入了用于感应合等离子体质谱 (ICP-MS) 的数字波形扫描四极质量波器 (数字QMF). 数字QMF为元素分析提供了高分辨率和广泛的质量范围,验证了其对先进ICP-MS应用的潜力.
科学领域:
- 分析化学 分析化学
- 质谱测量质量谱测量
- 原子光谱学 原子光谱学
背景情况:
- 在ICP-MS中,常规的四极质量过器 (QMF) 依靠电压扫描进行离子过.
- 数字QMF技术提供了使用数字波形频率扫描的替代方法.
- 了解数字QMF在不同稳定区的性能对于其应用至关重要.
研究的目的:
- 为ICP-MS开发和描述一个数字波形扫描四极质量过器 (数字QMF).
- 评估数字QMF的性能,包括质量范围,分辨率和灵敏度,跨越各种稳定区和工作周期.
- 用数字QMF技术证明高分辨率元素分析的可行性.
主要方法:
- 为ICP-MS开发一个数字QMF系统.
- 通过扫描波形频率和修改工作周期来评估数字QMF性能.
- 基于质量电荷比 (m/z) 和其与波形频率 (m/z 1/f2) 的关系的离子过的分析.
- 在不同的稳定区 (1至3.2) 和工作周期下确定质量范围,分辨率 (R10%) 和灵敏度.
主要成果:
- 频率与m/z校准一致匹配所有测试稳定区的理论预测.
- 在3.2稳定区实现了广泛的质量范围 (40232 Th),覆盖了大多数元素.
- 更高的稳定性区域和工作周期提高了分辨率 (例如,40Ar+的R10%的1400),但降低了灵敏度.
- 最好的分辨率为115In+的1200,232Th+的1100在3.2区,工作周期为62.50/37.50.
结论:
- 数字QMF成功地为ICP-MS运行,验证了数字波形扫描原理.
- 数字QMF显示了高分辨率元素分析的潜力,与传统方法相比.
- 电子和仪器仪表的进一步进步可能会导致ICP-MS的数字QMF性能得到改善.
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