1. Empa, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, State Food Law Enforcement Authority, Werkhofstrasse 5, CH-4509 Solothurn, Switzerland, Agroscope Reckenholz-Tänikon Research Station ART, Reckenholzstrasse 191, CH-8046 Zürich, Switzerland, and Institute for Chemical and Bioengineering, ETH Zurich, Wolfgang-Pauli Strasse 10, CH-8093 Zürich, Switzerland