1. a Department of Analytical Chemistry, Faculty of Chemical and Food Technology , Slovak Technical University , Radlinského 9, Bratislava, 812 37, Slovak Republic
2. b Slovak Environmental Agency , Hanulova 5/D, Bratislava, 844 40, Slovak Republic
3. c Department of Industrial Ecology, Faculty of Materials Science and Technology , Slovak Technical University , Pavlínska 16, Trnava, 917 24, Slovak Republic
4. d Department of Analytical Chemistry, Faculty of Chemical and Food Technology , Slovak Technical University , Radlinského 9, Bratislava, 812 37, Slovak Republic