1. University of Lodz, Faculty of ChemistryDepartment of Inorganic and Analytical Chemistry Tamka 12 91-403 Lodz Poland
2. Charles University, Faculty of ScienceDepartment of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry Albertov 6 CZ-12843 Prague 2 Czech Republic
3. Karl-Franzens University GrazInstitute of Chemistry-Analytical Chemistry Universitaetsplatz 1 Graz 8010 Austria