TOTAL CMB ANALYSIS OF STREAKER AEROSOL SAMPLES BY PIXE, PIGE, BETA-ABSORPTION AND OPTICAL-ABSORPTION ANALYSES

Multielemental analyses of aerosol samples are widely used in air poll ution receptor modelling. Specifically, the chemical mass balance (CMB ) model has become a powerful tool in urban air quality studies. Input data required for the CMB includes not only the traditional X-ray flu orescence (and hence PIXE) detected elements, but also total mass, org anic and inorganic carbon, and other light elements including Mg, Na a nd F. The circular streaker sampler, in combination with PIXE analysis , has developed into a powerful tool for obtaining time-resolved. mult ielemental aerosol data. However, application in CMB modelling has bee n limited by the absence of total mass and complementary light element data. This study reports on progress in using techniques complementar y to PIXE to obtain additional data from circular streaker samples, ma intaining the nondestructive, instrumental approach inherent in PIXE: beta-gauging using a Pm-147 source for total mass; optical absorption for inorganic carbon; and PIGE to measure the lighter elements.