1. Chair of Analytical Food Chemistry, Technical University Munich, Maximus-von-Imhof-Forum 2, 85354 Freising, Germany
2. Research Unit Analytical BioGeoChemistry (BGC), Helmholtz Zentrum München, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany
3. The Waltham Petcare Science Institute, Mars Petcare UK, Waltham-on-the-Wolds, Leicestershire LE14 4RT, United Kingdom