1. Department of Physical Chemistry, Faculty of Science, Palacky University, Svobody 26, 77146 Olomouc, Czech Republic, Department of Pharmaceutical Technology, Faculty of Pharmacy, Charles University, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic, and Department of Analytical Chemistry, Faculty of Science, Palacky University, Svobody 26, 77146 Olomouc, Czech Republic