Analysis of impacted aerosols and XANES to determine oxidation
Shared by: sparkunder23
Analysis of impacted aerosols and XANES to determine oxidation state To understand the effect of aerosols on global climate a detailed understanding of sources, transport, and fate and not at least of the physical and chemical properties of atmospheric particles is necessary. Using SR-TXRF application, sampling time can be diminished resulting in a more precise resolution of atmospheric events. To optimise sampling and measurements a method that uses aerosol collector plates directly as sample carriers for SR-TXRF application is desirable and developed. Aerosol samples, directly sampled on sample reflectors are investigated and XANES measurements should help to determine the oxidation state of toxic elements, using the feature of TXRF that only small sample masses are required. In this case the specimen can be collected directly on the clean reflector by means of impactors that can also separate the particulate matter by size. The chemical speciation of the toxic elements is of relevance for the environmental impact. This is done in cooperation with Prof. Broekaert, Inst. Of Anorganic and Applied Chemistry, Univ. Hamburg.