在使用S-镜头的电喷射电离-质谱接口中进行离子传输
Yihui Yan1, Lucas Schmitt1, Anastasiya Khramchenkova1
1Chair of Physical Chemistry, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany.
Journal of mass spectrometry : JMS
|July 4, 2023
概括
我们为集群和纳米粒子研究开发了一种定制的电子喷射电离-质谱 (ESI-MS) 接口. 发射器设计和S-镜片参数的优化显著提高了化学反应性研究的离子传输效率.
科学领域:
- 分析化学 分析化学
- 表面科学是一门学科.
- 材料科学 材料科学 材料科学
背景情况:
- 研究集群和纳米颗粒的化学反应和沉积需要专门的离子源.
- 现有的电子喷射电离-质谱 (ESI-MS) 接口可能没有为离子束实验进行最佳设计.
研究的目的:
- 为离子束实验设计和描述了一种新的内部 ESI-MS 接口.
- 为集群和纳米粒子优化离子形成和转移效率.
主要方法:
- 接口包括纳米电子喷雾剂,离子转移毛细血管和S-镜头离子导体.
- 进行了ESI电压,流速,发射器尖端直径,毛细血管电压/温度和S镜头射频参数的系统优化.
- 性能是基于总离子电流和传输效率来评估的.
主要成果:
- 确定了二氧化发射器的最佳运行条件,较小的尖端直径显示出更高的传输效率.
- 通过增加电压和温度,通过毛细血管改善了离子传输.
- 在RF振幅>50V p/p和频率>750 kHz时,S镜头显示稳定的离子传输区域为~20%.
- 离子电流在650 kHz和400 V p/p时达到2.6倍的增长,更高的射频振幅聚焦离子束.
结论:
- 定制的ESI-MS接口与S-镜头离子导向是有效的离子束实验.
- 优化接口参数可提高离子传输效率,用于研究集群和纳米粒子.
- 开发的接口有助于对纳米级材料的化学反应和沉积进行详细的研究.
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