Abstract
Energy dispersive photon induced X-ray fluorescence analysis is applied to atmospheric aerosols. The aerosol samples are taken with a three step air dust impactor and a filter sampler. The impactor and the filter sampler are first compared with each other with regards to their efficiencies to collect airborne trace elements. Under the chosen experimental conditions, the filter sampler collects three to five times more iron and zinc than the impactor. The distribution of heavy metals in the different particle sizes of air dust at the chosen sampling place is then investigated on aerosol samples from the three step cascade impactor. Most of the iron and zinc is located in the particle size range below 3.5 μm. The distribution of both elements in particles of different size ranges remains relatively constant over the observation time. Zinc containing dust appears to be finer than iron containing dust.
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