1. Department of Building Materials Technology; Faculty of Materials Science and Ceramics; AGH University of Science and Technology; Mickiewicza 30 30-059 Krakow Poland
2. Laboratory of Analytical Chemistry; Department of Chemistry; University of Athens; Athens 157 71 Greece
3. Institute of Chemistry; Analytical Chemistry; Karl-Franzens-University; Universitätsplatz 1 8010 Graz Austria