[1] Research Group of Applied and Analytical Chemistry, CMK, Hasselt University, Agoralaan Gebouw D, 3590 Diepenbeek, Belgium
[2] Institute of Chemistry and Technology of Petroleum and Coal, Wroclaw University of Technology, ul. Gdañska 7/9, 50-344 Wroclaw, Poland
[3] NuTeC, Department TIW, XIOS, Agoralaan Gebouw H, 3590 Diepenbeek, Belgium