Study on Characteristics of Atmospheric Particulates in Beijing Using Nuclear Analysis Technique

The particle size distributions in Beijing collected in a normal weather period, a dust storm arrived from remote area and the local dust storm arising were measured by PIXE combined with a multi-stage sampler, and the change of the concentration of particulates with time was obtained by PIXE combined with a auto-step time sequence sampler. The contributing rates from main sources were calculated with factor analysis.