利用APS分析大气气溶胶数浓度和质量浓度

Analysis of aerosol number concentration and mass concentration using APS

利用自行研制的空气动力学粒谱仪(APS:aerodynamic particle sizer)和颗粒物质量监测器振荡天平(tapered element oscillating microbalance,TEOM)测量了合肥市郊大气气溶胶的粒子数浓度与质量浓度.在对二者进行相关性分析的基础上,运用多元回归方法,得出了利用粒子数浓度谱获取颗粒物(PM10)质量浓度谱的经验公式;同时分析了合肥市初夏PM2.5的质量浓度在PM10的质量浓度中所占比例,以及PM10的数浓度和质量浓度的日变化特征,以期对合肥市大气污染总量控制方案及对策提供科学依据.

Aerosol number and mass concentrations in rural area at Hefei city were measured simultaneously with home-made aerodynamic particle sizer （APS） and tapered element oscillating microbalance （TEOM）. An empirical formulas was developed using multiple regression based on the relationship of number and mass concentration. Mass concentration of PM2.5 was calculated and its percentage in PM10 was also illustrated. Diulmal variations of number and mass concentrations of PM10 were presented and its cause has been discussed, which will provide scientific base for air pollution control strategy and methodology in Hefei city.