1. Department of Analytical Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya 6, UA-79005 Lviv, Ukraine
2. Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster, Germany
3. Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland