通过高动能离子移动性光谱仪检测三三氧化物
Christoph Schaefer1, Martin Lippmann1, Michiel Beukers2,3
1Institute of Electrical Engineering and Measurement Technology, Department of Sensors and Measurement Technology, Leibniz University Hannover, Appelstr. 9A, Hannover 30167, Germany.
Analytical chemistry
|November 10, 2023
概括
高动能离子移动谱法 (HiKE-IMS) 提供了敏感的微量气体分析,具有降低的交叉灵敏度. 这项研究通过分析其独特的离子运动指纹来证明其用于检测三三氧化 (TATP) 的用途.
科学领域:
- 分析化学 分析化学
- 频谱测量是一种光谱测量.
- 微量气体分析分析
背景情况:
- 高动能离子移动光谱法 (HiKE-IMS) 是一种低功耗技术,用于在复杂环境中检测气态分子.
- 在降低压力 (10-60 mbar) 处运行将离子中性碰撞降至最低,减少交叉灵敏度并消除了预先分离的需要.
- HiKE-IMS允许在广泛的电场强度 (E/N高达120 Td) 上运行,允许基于低电场移动性和电场依赖的移动性进行分离.
研究的目的:
- 使用HiKE-IMS检测三三氧化物 (TATP).
- 探索TATP电离路径和取决于场的离子流动性.
- 建立一个TATP离子流动的数据库作为E/N的函数,以进行可靠的检测.
主要方法:
- 使用高动能离子移动谱仪 (HiKE-IMS) 进行TATP分析.
- 使用不同的初级反应物离子 (H3O+和NH4+) 进行了TATP电离的研究.
- 在一系列降低的电场强度 (E/N) 中测量离子流动性.
主要成果:
- 用H3O+进行质子转移电离导致了TATP的碎片化.
- 使用NH4+作为反应离子产生了TATP·NH4+添加物,在高E/N时碎片化.
- 产生了TATP的独特指纹,包括各种离子物种及其取决于场的移动性.
结论:
- HiKE-IMS提供了一种用于微量气体分析的多功能平台,包括敏感的TATP检测.
- TATP·NH4+ adduct 的取决于场域的碎片化提供了可靠识别的额外数据.
- 在变量E/N下运行HiKE-IMS可以显著降低TATP检测中的错误阳性率.
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