The development of a Lithium-attachment chemical ionization mass spectrometer for studies in the atmosphere

该研究项目将开发一种最先进的电离源，可用于实验室研究，并作为气相和气溶胶相分析物的检测和定量的现场仪器。一种新的适应锂+附着化学电离质谱将被用作检测系统的各种物种存在于大气中。通过实现该项目中的创新，Li+-附件有可能成为一种通用的检测系统，几乎可以检测空气中的任何成分，因此在它可以监测的化学系统以及可以使用的条件方面是多样化的。该项目将通过三个原理验证项目，即BVOCs的检测、有机气溶胶的检测和形态分析以及确定有机活度系数的Knudsen泻流质谱法的开发，来展示这一电离方案的能力。

This research project will develop a state-of-the-art ionization source that can be used for laboratory studies and as a field instrument for the detection and quantification of both gas-phase and aerosol-phase analytes. A novel adaptation of Li+-attachment chemical ionization mass spectrometry will be used as a detection system for various species present in the atmosphere. By realizing the innovations within this project, Li+-attachment has the potential to be a universal detection system that can ionize practically any component of the air and is therefore diverse with respect to the chemical systems that it can monitor as well as the conditions in which it can be employed. This project will demonstrate the capability of this ionization scheme via three proof-of-principle projects, namely the detection of BVOCs, detection and speciation of organic aerosols and the development of Knudsen effusion mass spectrometry to determine organic activity coefficients.