TOKYO UNIVERSITY OF INFORMATION SCIENCES

Samples of 24-hours total suspended particulate matter were collected by high volume air samplers during December 1996 to January 1997 at a station in Bangkok, Thailand, and analyzed for 14 elements and 2 carbons. Seven source profiles and the average mass concentration of 42 data ambient data were used to run the Chemical Mass Balance (CMB8) model. The source apportionment by CMB8 gave similar results comparing with the former results by Factor Analysis – Multiple Regression (FA-MR) model. The results revealed that major sources of particulate matter in Bangkok were: soil, road dust and automobile (80 %). The minor source contributions were: sea salt (4.22%), refuse incineration and biomass burning (0.82%), steel mill (0.60%) and fuel oil combustion (0.33). The lack of source profile for biomass or open burning in Bangkok resulted in much lower contribution of this source when compared to that from FA-MR. This source profile is needed to improve the CMB calculation of source contribution of particulate matter in Bangkok area. Key wards: PM10, receptor model, CMB8, factor analysis-multiple regressio