1. Department Aquatic Ecotoxicology, Faculty of Biological Sciences; Goethe University Frankfurt am Main; Germany
2. Department of River Ecology and Conservation, Senckenberg; Research Institute and Natural History Museum; Senckenberganlage 25 60325 Frankfurt Germany
3. Department Environmental Analytical Chemistry, Faculty of Geosciences and Geography; Goethe University Frankfurt am Main; Germany
4. Food GmbH Jena Analytik - Consulting; Germany