1. Institute of Analytical and Bioanalytical Chemistry; Ulm University, D-; 89081 Ulm Germany
2. Department of Analytical Chemistry, Faculty of Pharmacy; Gazi University, TR-; 06330 Etiler-Ankara Turkey
3. Labor Dr. Merk & Kollegen, D-; 88416 Ochsenhausen Germany
4. Institute of Surface Chemistry and Catalysis; Ulm University, D-; 89081 Ulm Germany
5. Institute of Inorganic Chemistry II; Ulm University, D-; 89081 Ulm Germany