Characterization and Apportionment of Primary and Secondary Organic Aerosols during the MIRAGE-Mex Experiment Using GCMS and LCMS Methods

该项目将尝试通过将气相色谱质谱分析有机气溶胶与液相色谱法相结合的方法来表征大城市对区域和全球环境的影响，墨西哥城污染流出场运动期间大气气溶胶的组成和来源，液相色谱法已广泛应用于水生化学领域。该项目将集中研究极性分子和大分子（分子量从300-2000原子质量单位不等），据信它们来自大气处理，但预计会存在于一次排放中。预计这项研究将增强用于研究大气气溶胶中复杂有机混合物的工具，并使人们更好地了解这些气溶胶的来源和组成，以及它们对气候强迫、人类健康和生态系统的影响。1名博士后和2名本科生将参与本项目大气化学研究。一名本科生将参与该项目的实地操作，另一名将有机会研究用于有机气溶胶分析的分析方法。

This project will attempt to characterize the composition and sources of atmospheric aerosols during the Megacity Impacts on Regional and Global Environments, the Mexico City Pollution Outflow field campaign, by integrating gas chromatography mass spectrometry analysis of organic aerosols with liquid chromatography based methods that have been widely used in the aquatic chemistry field. The project will focus on polar molecules and macromolecules (molecular weights ranging from 300-2000 atomic mass units) which are believed to originate from atmospheric processing but are expected to exist in primary emissions. This study is expected to result in the enhancement of tools used to study complex organic mixtures in atmospheric aerosols and lead to a greater understanding of the origin and composition of these aerosols, as well as their impacts on climate forcing, human health and the ecosystem. A post-doctoral scholar and two undergraduate students will participate in atmospheric chemistry research under the auspices of this project. One undergraduate student will participate in the field operations of the project and a second will have the opportunity to work on analytical methods used for organic aerosol analysis.