1. Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstrasse 5, 45141 Essen, Germany
2. Institut für Energie- und Umwelttechnik e. V. (IUTA), Bliersheimer Straße 59−60, 47229 Duisburg, Germany
3. Department of Environmental Geosciences and Environmental Science Research Network, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
4. Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Universitätsstrasse 2, 45141 Essen, Germany
5. IWW Water Centre, Moritzstraße 26, 45476 Mülheim an der Ruhr, Germany