1. Department Safety in the Food Chain, German Federal Institute for Risk Assessment, Unit Feed, and Feed Additives, Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
2. Fraunhofer-Institute for Molecular Biology and Applied Ecology IME, Auf dem Aberg 1, 57392 Schmallenberg-Grafschaft, Germany
3. Chemical and Veterinary Analytical Institute Münsterland-Emscher-Lippe (CVUA-MEL), Joseph-König-Strasse 40, 48147 Münster, Germany
4. Agricultural Technology Centre Augustenberg (LTZ), Neßlerstraße 25, 76227 Karlsruhe, Germany
5. Department of Hydrology and Substance Balance, University of Kassel, Kurt-Wolters-Strasse 3, 34125 Kassel, Germany
6. School of Chemistry, Monash University, Box 23, Victoria 3800, Australia