1. EAWAG, Swiss Federal Institute for Environmental Science and Technology, P.O. Box 611, 8600 Duebendorf, Switzerland
2. ETHZ, Swiss Federal Institute of Technology, Department of Chemistry, Zurich, Switzerland
3. Department of Physics, Royal College of Surgeons in Ireland, Dublin 2, Ireland
4. Department of Chemistry, Royal College of Surgeons in Ireland, Dublin 2, Ireland
5. Department of Pharmacy, University of Science, Penang, Malaysia
6. Laboratoire de Chimie Analytique, Faculte de Pharmacie, Universite de Montpellier 1, France