TXRF

TXRF is a microanalytical method that can determine elements in the ppb range and below. The strength of the method is the use of small sample volumes (e.g., m < 10 μg, V < 10 μL), cost efficiency, and ease of use. In our working group, atmospheric aerosols, nanoparticles, metal-containing proteins, and atmospheric mercury have been successfully studied. To additionally determine the oxidation state, XANES (x-ray absorption near edge fine structure) measurements can be performed.

The main focus of the Fittschen group lies on advancing analytical performance of TXRF by understanding fundamental aspects (shading, morphology) overcoming critical limitations. Here we collaborate with the Atomic Institute in Vienna, among others.