1. Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
2. Agilent Technologies, Hewlett Packard Street 8, D-76337 Waldbronn, Germany
3. Agilent Technologies, Netherlands BV, NL-4330 EA Middelburg, Netherlands
4. Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel, Belgium
5. Laboratory for Chemical Technology (LCT), Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering & Architecture, Ghent University, Technologiepark 125, B-9052 Zwijnaarde, Belgium
6. Department of Chemistry and Polymer Science, University of Stellenbosch, Private Bag X1, ZA-7602 Matieland, South Africa