环形溶蚀器大气颗粒物采集系统条件实验研究

Experimental Study on Annular Denuder Coating Condition of an Aerosol Particle Sampling System

为确定环形溶蚀器大气颗粒物采集系统的最优化条件,于2008年夏季与冬季在北京市进行了关于优化环形溶蚀器涂渍溶液浓度的条件实验。结果表明:为保障大气中酸碱性气体的去除效率达到95%以上,环形溶蚀器中柠檬酸涂渍溶液的优化浓度在夏季和冬季分别为6%与3%;环形溶蚀器中碳酸钠涂渍溶液的优化浓度在夏季和冬季分别为2%与4%。讨论说明在特定地点特定时间利用环形溶蚀器大气颗粒物采集系统采样前,确定环形溶蚀器涂层溶液优化浓度的必要性。

In order to determine the optimum sampling condition of an aerosol particle sampling system with annular denuders, the experiments for optimizing the concentrations of annular denuder coatings were carried out in Beijing in the summer and winter of 2008. The results showed that the concentrations of coating solution of citric acid in the summer and winter were 6% and 3%, respectively, while the concentrations of coating solution of sodium carbonate in the summer and winter were 2% and 4%, respectively. It was indicated the necessity of the determination of the concentration of annular denuder coatings for an aerosol particle sampling system with annular denuders in a specific area and a specific period of sampling time.