大气颗粒物化学组成分析

大气颗粒物的化学组成非常复杂，其中包括大量矿质氧化物、可溶性硫酸盐、硝酸盐、海盐、多环芳烃、有机酸和有机氟等。大气颗粒物对局地、区域甚至全球大气辐射平衡、大气能见度、元素的生物化学循环具有重要影响，危害人体健康并参与大气非均相反应。化学组成是决定大气颗粒物各种环境效应的关键因素。国内外对大气颗粒物化学组成分析进行了大量的研究工作。特别是随着气动力学透镜的发展与应用，结合快速、灵敏的光谱和质谱检测手段，适合大气颗粒物化学组成的在线分析方法取得了较大的突破。

Analysis of Chemical Composition of Atmospheric Particles

There has been intense interest in atmospheric particulates because of their important environmental effects such as the effect on radiant balance,degradation of visibility,biochemical cycle of elements,human health and heterogeneous reaction in atmosphere.Chemical composition is a crucial factor for the environmental effects of atmospheric particulates.The online analysis methods for atmospheric particles have made a great progress with the development of aerodynamic lens,spectrometer and mass spectrograph which has high time resolution and low detect limit.The chemical composition of atmospheric particles is very complicated.It consists of mineral oxides,soluble sulfate and nitrate,sea salt,polycyclic aromatic hydrocarbons(PAHs),organic acids and organochlorines and so on.The research progress about analytic methods and chemical composition for atmospheric particulates is reviewed in this article.