1. University of Santiago de Compostela; Department of analytical Chemistry; Nutrition and Bromatology. Avda. das Ciencias s/n 15782 Santiago de Compostela Spain
2. University of Aberdeen; Department of Chemistry, TESLA (Trace Element Speciation Laboratory); Meston Walk AB24 3UE Aberdeen UK
3. Chemist Metal Section; Eurofins Miljo A/S, Ladelundvej 85 6600 Vejen Denmark
4. Department of Analytical Chemistry, Fraunhofer Institute for Toxicology and Experimental; Medicine, Nikolai-Fuchs-Strasse 1 30625 Hannover Germany
5. Trent University; Water Quality Centre, 1600 West Bank Drive Peterborough, ON K9L 0G2 Canada
6. University of Graz; Institute of Chemistry, Analytical Chemistry, NAWI Graz; Universitätsplatz 1 8010 Graz Austria