Atmospheric Chemistry of Alpha-Oxygenated Carbonyl Compounds, Including Hydroxyacetone

9707002周将进一步开发和部署一种高灵敏度的大气甲醛和含氧羰基化合物的测量技术，包括羟乙醛、羟丙酮、乙二醛、甲基乙二醛和甲醛。含氧羰基化合物是生物和人为碳氢化合物在大气中氧化的重要产物。由于它们在对流层低层太阳光谱中的光解活性，这些化合物成为大气自由基的重要前体。该测量技术是基于使用盘管取样器对感兴趣的化合物进行水洗，然后用DNPH衍生化和高效液相分析。检测下限为10-30ppt，时间分辨率小于20分钟。该仪器将于1998年在纽约州顶峰州立公园的多名调查员现场活动中部署，作为NARSTO-东北计划的一部分，将在那里同时测量各种大气痕量物种。

9707002 Zhou A highly sensitive technique for the atmospheric measurement of formaldehyde and oxygenated carbonyl compounds, including hydroxyacetaldehyde, hydroxyacetone, glyoxal, methylglyoxal, and formaldehyde will be further developed and deployed in the field. Oxygenated carbonyl compounds are important products of the atmospheric oxidation of both biogenic and anthropogenic hydrocarbons. Because of their photolytic activities in the solar spectrum of the lower troposphere, these compounds become important precursors for atmospheric free radicals. The measurement technique is based on aqueous scrubbing of the compounds of interest using a coil sampler followed by derivatization with DNPH and HPLC analysis. The detection limits will be on the order of 10-30ppt with a time resolution shorter than 20 minutes. The instrument will be deployed during a multi-investigator field campaign in 1998 at Pinnacle State Park, NY, where a large variety of atmospheric trace species will be measured simultaneously as part of the NARSTO-Northeast program.