1. Department
of Chemistry, University of Pretoria, Lynnwood Road, Pretoria, South Africa
2. Joint
Mass Spectrometry Centre/Chair of Analytical Chemistry, University of Rostock, Rostock, Germany
3. Joint Mass Spectrometry
Centre/Cooperation Group Comprehensive Molecular Analytics, Helmholtz
Zentrum München, Neuherberg, Germany
4. Sasol Southern
Africa Energy, Energy Technology, Klasie
Havenga Street, Sasolburg, South Africa