1. Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstr. 48, 48149 Münster, Germany
2. Institute of Plant Biology and Biotechnology, University of Münster, Schlossplatz 8, 48143 Münster, Germany
3. European Virtual Institute for Speciation Analysis (EVISA), Corrensstr. 48, 48149 Münster, Germany
4. Institute of Physical Chemistry, University of Münster, Corrensstr. 28/30, 48149 Münster, Germany
5. Elemental Scientific, Inc., 7277 World Communications Dr, Omaha, NE 68022, USA