1. Department of Chemistry and Biochemistry; Mendel University in Brno; Zemedelska 1 CZ-613 00 Brno Czech Republic
2. Central European Institute of Technology; Brno University of Technology; Purkyňova 656/123 612 00 BRNO Czech Republic
3. Faculty of Electrical Engineering and Communication; Brno University of Technology; Technicka 3058/10, 616 Brno Czech Republic
4. Institute of Analytical Chemistry; Slovak University of Technology in Bratislava; Radlinskeho 9 SK-812 37 Bratislava Slovakia
5. Department of Chemistry; Faculty of Natural Sciences; University of Tirana, Blv. Zog I, No. 2/1, 1001; Tirana Albania