Abstract: The density of the organic matter, the composition of each group constituent, the composition and distribution characteristics of the saturated hydrocarbons and PAHs in the air-borne dusts in Beijing municipality are analyzed.

• 文摘:对北京石景山地区大气中有机质浓度、各族组成及其饱和烃、多环芳烃的组成和分布特征进行了分析。