THE APPLICATION OF ACCELERATOR MASS-SPECTROMETRY (AMS) IN THE STUDY OF SOURCE IDENTIFICATION OF AEROSOLS IN CHINA

Accelerator Mass Spectrometry (AMS) is a new physical technique and it was successfully established in China in 1992. This paper describes t he application of AMS in source identification for atmospheric aerosol s which was part of the national project of AMS application in environ mental research. For comparison, sources were studied using multivaria te analysis models such as correspondence factor analysis, principal f actor analysis and pattern recognition analysis. The results of the sa mples collected in suburb of Beijing, analysed by factor analysis, sho wed that the predominant TSP source was soil which contributed more th an 50% to atmospheric particles. However, the AMS results demonstrated that carbonaceous aerosols have quite different emission sources. For carbonaceous aerosols of Beijing, Hunan and Shandong, the contributio n to ambient particles from fossil fuel was nearly 2/3, and as human a ctivities (coal-burning, etc.) increases, the fossil part contributes more. Therefore, it is significant to combine the method of factor ana lysis and AMS in the study of atmospheric aerosols.