1Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology,
Radlinského 9, 812 37 Bratislava, Slovak Republic
2Department of Chemistry, Faculty of Education, Catholic University in Ružomberok,
Hrabovská cesta 1, 034 01 Ružomberok, Slovak Republic
Pol. J. Environ. Stud. 2012;21(1):7–13