1 Gdansk University of Technology, Faculty of Chemistry, Department of Analytical Chemistry, 11/12 Narutowicza St., Gdansk 80-233, Poland.
2 Aristotle University of Thessaloniki, Department of Chemistry, Environmental Pollution Control Laboratory, Panepistimioupolis GR-541 24, Thessaloniki, Greece.
3 Gdansk University of Technology, Faculty of Chemistry, Department of Analytical Chemistry, 11/12 Narutowicza St., Gdansk 80-233, Poland. Electronic address: zanpolko@pg.edu.pl.