1. Institute of Nutritional and Food Sciences, Food Chemistry, University of Bonn, Endenicher Allee 11−13, 53115 Bonn, Germany
2. Department for Applied Sciences, Hochschule Bonn-Rhein-Sieg, Von-Liebig-Straße 20, 53359 Rheinbach, Germany
3. HyperChrom GmbH Germany, Endenicher Allee 11−13, 53115 Bonn, Germany