Indoor Pollution of CO and Particulate Matter in Beijing and Its Elemental Analysis
北京市三类住宅室内CO、颗粒物污染及其元素分析

Three types of houses in Beijing were investigated that a smoking household and non-smoking one in each type were compared. Inhalable particulate(IP), respira-ble particulate(RP)and carbon monoxide(CO)were monitored in the living rooms and kitchens respectively for four seasons. At the same time carboxyhaemoglobin(COHb)was measured individually for each of the householders. The results showed that indoor air pollution was rather serious, especially in winter when particulate concentration was even as high as 47ppm. Indoor air pollution is closely related to types of houses, particularly to the ways of heating. Air pollution will be greatly decreased when central heating facilities are established.The analysis of 30 elements showed that the pollution was typically derived from coal burning and aggravated by dust wind, but indoor higher Pb level was probably due to use of liquified petroleum gas for cooking. In our study, the effect of cigarette smoking seemed to be covered up by the serious indoor air pollution.