中文摘要：

利用电子显微镜，采用形态分析法和X射线能谱分析法相结合的方法对2003年广州灰霾天气中单个气溶胶颗粒物的大小、形态结构和元素组成进行了研究。在灰霾天气中，颗粒物的半径在1．0μm以下，属于细颗粒物；X射线能谱分析的结果显示，它们有比较复杂的组成，大都是混合物。在灰霾天气，常可以观察到一些特殊的颗粒物，它们带有卫星滴结构。比较灰霾天气形成前后一些气溶胶颗粒物的形态结构和元素组成，它们有着较明显的差异。这些观察提供了证据：在灰霾天气过程中，部分粒子的组成有可能发生了变化。

英文摘要：

Electronic microscope was used in the study of the nature of single aerosol particle collected from the air in haze in Guangzhou city during 2003. The collected particles were examined by a transmission electron microscope equipped with an energy-X-ray （EDX） analyzer in order to obtain the size, shape and elemental composition of individual particles. Most of the particles in the haze dominated in the radius range of 0. 2μm to 0. 9μm were mainly present as an internal mixed particle. It was often found that some particles with satellite droplet structure in the haze. Comparing the shape and elemental composition of single aerosol particle before and after the haze formation, it suggests that some particles are changing in the nature during the process of the haze formation.