大气降水中羰基化合物对有机酸形成贡献的研究

项目名称： 大气降水中羰基化合物对有机酸形成贡献的研究

项目编号： No.20807041

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 轻工业、手工业

项目作者： 庞小兵

作者单位： 中国科学院地球化学研究所

项目金额： 18万元

中文摘要： 羰基化合物和有机酸是大气重要有机物和气溶胶主要有机成分，在大气化学中发挥重要作用。羰基化合物是水相中有机酸重要前驱物，但目前对其中转化机理并不清楚，本项目为认识这个关键科学问题而实施。我们首先建立了水相羰基化合物分析方法并研究了贵阳市降水中羰基化合物时空变化与雨水物理化学性质关系(pH值，电导性、降水量等)发现羰基化合物浓度与pH值、电导性正相关，与降水量负相关；随后发现GC/MS较HPLC方法在检测羰基化合物更灵敏，可实行自动化检测。我们将项目集中在大气羰基化合物GC/MS分析方法的研究，建立了大气羰基化合物GC/MS方法；后来利用微芯片技术与化学衍生方法相结合，建立了灵敏的快速的GC/MS方法，这个方法为实现在线检测羰基化合物奠定了基础。在本项目资助下，我们发表的SCI论文共计6篇，其中IF>3的论文5篇，同时获得中国博士后科学基金2项，贵州省科学基金1项，获得英国皇家学会牛顿国际奖学金资助，同时在国际交流也取得良好成果，与英国约克大学化学系和英国国家大气科学研究中心都建立了良好关系。

中文关键词： 羰基化合物；降水；有机酸；GC/MS；微芯片

英文摘要： Carbonyl compounds and organic acids are the important components of VOCs and aerosols in the atmosphere. They play important roles in the atmophseric chemistry. Carbonyl compounds are the main procursor of organic acids in rainwater. However, the machnism of the processes is uncovered, which will be resolved in this project. During past three years, the analytical method was developed firstly. Then we studied the temportal and spacital variations of carbonyl compounds in rainwater of Guiyang City. The properties of rainwater were determined simutantously including pH, electronic conductance, volume of rainwater etc. Positive relationship was found between concentration of carbonyls and pH, electronic conductance and neglective relationship was observed between carbonyl concentrations and volume of rainwater.In recent two year GC/MS was developed dueto more sensitive of GC/MS compared with HPLC method. Combined with the lab-on-chip technique,a microfluidic Lab-on-chip derivatisation technique for the measurement of gas phase formaldehyde was developed. This work is the base for on-line measuring formaldehyde in future.Up to now, six SCI international scientific papers have been publiched in peer reviewed journals. Under the support of this funding, we also got two fundings from Chinese Postdoctor Science Fundation and one funding from Guizhou Provice. During the period of conducting this project,I was honoured by Newton International Fellowship from Royal Society in UK and then set up a good relationship with Univerisy of York and National Centre of Atmospheric Sciences in UK.

英文关键词： Carbonyl compounds; rainwater; organci acids;GC/MS; Lab-on-a Chip