1. Department of Analytical Chemistry; University of Chemistry and Technology Prague; 166 28 Prague 6 Technická 5 Czech Republic
2. Charles University, First Faculty of Medicine; 121 08 Prague 2 Kateřinská 32 Czech Republic
3. Department of Physics and Measurements; University of Chemistry and Technology Prague; 166 28 Prague 6 Technická 5 Czech Republic
4. Charles University, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of environmental electrochemistry; 128 43 Prague 2 Hlavova 2030 Czech Republic