1. Leibniz Institut für Analytische Wissenschaften—ISAS—e.V., Bunsen-Kirchhoff-Str. 11, 44139 Dortmund, Germany
2. Institute of Analytical Chemistry, Czech Academy of Sciences, Veveří 97, 60200 Brno, Czech Republic
3. Department of Physics, Faculty of Science, University of Zagreb, Bijenicka 32, 10000 Zagreb, Croatia