1. ESWE-Institute for Water Research and Water Technology, D-65201 Wiesbaden, Soehnleinstrasse 158, Germany, The Royal Danish School of Pharmacy, Institute of Analytical and Pharmaceutical Chemistry, Section for Environmental Chemistry, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Ecotoxicology GmbH, Böttgerstrasse 2-14, D-60437 Flörsheim am Main, Germany