1. Joint Mass Spectrometry Center
2. Chair of Analytical Chemistry
3. Institute of Chemistry
4. University of Rostock
5. 18059 Rostock
6. Faculty of Mechanical Engineering and Marine Technology
7. Chair of Piston Machines and Internal Combustion Engines
8. Germany
9. Fine Particle and Aerosol Technology Laboratory
10. Department of Environmental Science
11. University of Eastern Finland
12. FI-70211 Kuopio
13. Finland