1. Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
2. Department of Applied Physics, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
3. Finnish Meteorological Institute, P.O. Box 1627, 70211 Kuopio, Finland
4. Cooperation
Group
Comprehensive Molecular Analytics, Helmholtz Zentrum München,
German Research Center for Environmental Health, 85764 Oberschleißheim, Germany
5. Analytical Chemistry, Institute of Chemistry, University of Rostock, 18059 Rostock, Germany
6. Department of Chemistry, University of Eastern Finland, P.O. Box 111, 80101 Joensuu, Finland