Development of Atmospheric Chemistry Instrumentation

丹佛大学部分开发的三个检测系统将进一步开发和研究，以确定进出大气的物种通量的能力。长径紫外（LPUV）光谱将与长径红外（LPIR）光谱相结合，用于测定各种物质的通量。快速响应的现场总硫监测仪也将优化响应速度和灵敏度。它将通过涡流相关技术用于通量研究。一些通量研究将与NCAR ASTER设施和阿贡国家实验室合作进行。建立了一种大气压力流系统，即自由基检测器，该系统对HO2和RO2自由基的浓度有响应。这种装置被命名为PERCA（化学扩增过氧自由基检测器），已被证明对许多碳氢化合物和含氧碳氢化合物的过氧自由基有反应，最高可达C8。利用PERCA，将进行进一步的研究，以克服无法获得稳定校准的问题。

Three detection systems which have been developed in part at the University of Denver will be further developed and investigated in terms of their ability to determine the flux of species to and from the atmosphere. Long-path UV (LPUV) spectroscopy will be coupled with long-path IR (LPIR) spectroscopy and used to determine the fluxes of various species. A fast response in-situ total sulfur monitor will also be optimized for response speed and sensitivity. It will be used for flux studies by means of the eddy-correlation technique. Some of the flux studies will be carried out in collaboration with the NCAR ASTER facility and Argonne National Laboratory. An atmospheric pressure flow system, free radical detector has been developed which is shown to respond to concentrations of HO2 and RO2 radicals. This apparatus, named PERCA (PEroxy Radical detector using Chemical Amplification) has been shown to respond to a number of hydrocarbon and oxygenated hydrocarbon peroxy radicals up to C8. Using the PERCA, further studies will be conducted to overcome the inability to obtain stable calibrations.