Studies of the Organic Composition of Tropospheric Aerosols

将进行实地和实验室研究， 了解颗粒相有机化合物在 大气地球化学循环 一个主要目标 该研究是完成的化学分析， 已经收集的气溶胶样本，作为 农村氧化剂研究及多元统计分析 数据分析。 通过进一步的实地研究，另 目的是进一步阐明不同的因素 涉及气相和颗粒相有机物的化学 已经在城市地区测量的化合物， 博尔德，科罗拉多，和一个原始网站在尼沃特岭，科罗拉多。 最后一个目标是氮的表征， 对流层含硫有机组分 颗粒和这些化合物的关系， 大气光解氧化循环 在这些研究中， 颗粒相有机组成的小时变化 将使用低容量采样技术进行测定， 通过色谱分离和灵敏检测。 提出 含氮和含硫有机成分的研究 将需要开发新的分析 涉及超临界流体萃取和选择性 通过荧光技术和原子发射检测。

Field and laboratory studies will be conducted to better understand the role of particulate phase organic compounds in atmospheric biogeochemical cycles. One principal objective of the research is the completion of the chemical analysis of aerosol samples that have already been collected as part of a study on rural oxidants and to perform multi-variate statistical analysis of the data. By way of further field studies, another objective is the further elucidation of the different factors that relate to the chemistry of vapor and particle phase organic compounds that have already been measured at an urban location in Boulder, Colorado, and a pristine site at Niwot Ridge, Colorado. A final objective is the characterization of nitrogen- and sulfur- containing organic constituents of tropospheric particulate and of the relationships of such compounds to atmospheric photolytic oxidation cycles. In these studies, hourly variations in the particulate phase organic composition will be determined using a low-volume sampling technique followed by chromatographic separation and sensitive detection. Proposed studies of nitrogen- and sulfur-containting organic constituents of particles will require the development of new analytical methods involving supercritical fluid extractions and selective detection by chemiluminescene techniques and atomic emission.