1 Department of Environmental Analysis, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308, Gdańsk, Poland.
2 Department of Environmental Analysis, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308, Gdańsk, Poland. ewa.mulkiewicz@ug.edu.pl.
3 Institute of Water Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.