1. Environmental Analytical Chemistry, ZAG, University of Tübingen, Hölderlinstrasse 12, 72074 Tübingen, Germany
2. Aquatic Ecology & Toxicology, Centre for Organismal Studies, University of Heidelberg, Im Neuenheimer Feld 504, Heidelberg 69120, Germany
3. TZW: DVGW-Technologiezentrum Wasser, 76139 Karlsruhe, Germany
4. Agilent Technologies, 76337 Waldbronn, Germany