TOPIC I "Aerosol Chemistry"

The working group aerosol chemistry deals with the chemical characterization of Emission aerosols (mainly from sources of combustion), artificially aged aerosols (so-called smog chamber studies) and in the environment.

On the one hand, the investigations on aerosol sources address the quantification of toxicologically relevant organic components of the aerosols and, on the other hand, the identification of individual or patterns of lead substances (markers) which are specific for the respective source and / or the combustion conditions.

In cooperation with partners which operate smog chambers, we study the aging of aerosols under realistic conditions. Samples with high time resolution are used to record the progress of degradation of relevant aerosol components and the formation of new components. The identification of components or patterns that are specific for formation of secondary organic aerosols (SOA) and aged primary aerosol particles is the focus of our research.

The temporal and spatial variability of aerosol composition and sources is in the focus of our studies of environmental aerosols. A key factor is the identification and quantification of the proportions of different primary and secondary aerosol particles (source apportionment) on the organic fraction of the particles. The basis for this is, among other things, the conductive substances and patterns identified in emission and artificially aged aerosols.

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