1. Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, Pardubice, Czech Republic
2. Department of Biological and Medical Sciences, Faculty of Pharmacy in Hradec Kralove, Charles University, Zborovska 2089, Czech Republic
3. Institute of Analytical Chemistry of the CAS, v. v. i., Veveri 967/97, Brno, Czech Republic