Development of Instrumentation and Methods for Measurements of Water-Soluble Organic Chemical Compounds in Ambient Aerosol Particles

该项目将开发分析方法，利用固相萃取技术按官能团对大气气溶胶中的水溶性有机化合物(WSOC)进行形态划分。其目标是将这种方法应用于颗粒到液体采样器(PILS)，扩大其在线测量有机气溶胶的广泛类别的能力。这些方法将通过在亚特兰大、佐治亚州城市和周围农村地区的测量进行评估。有机碳化合物通常包含大气中很大一部分细颗粒物，其中很大一部分是可溶于水的。在许多情况下，水溶性颗粒有机碳是由二次有机气溶胶形成的，这是一个复杂的过程，可能是细颗粒物质量的重要来源。这一示范项目将导致开发可部署在地面和机载在线和自动测量研究中的测量技术，从而更好地表征细颗粒含碳成分，并更好地了解细颗粒形成机制。这个项目将支持一名研究生的工作。

This project will develop analytical methods to speciate by functional groups the water-soluble organic compounds (WSOC) in atmospheric aerosols using solid phase extraction techniques. The goal is to apply this method to the Particle-Into-Liquid Sampler (PILS), expanding its capabilities for online measurements of broad classes of the organic aerosol. The methods will be evaluated through measurements in urban Atlanta, GA, and surrounding rural regions. Organic carbon compounds often comprise a significant fraction of fine atmospheric particles, and a major sub-fraction of these are soluble in water. In many cases water-soluble particulate organic carbon is formed from secondary organic aerosol formation, a complex process that can be a significant source of fine particle mass. This demonstration project will lead to the development of measurement techniques that can be deployed in both ground-based and airborne studies in online and automated measurements, leading to a better characterization of the fine particle carbonaceous component and a better understanding of fine particle formation mechanisms. This project will support the work of a graduate student.