1. Centre for Molecular Nanometrology
2. Technology and Innovation Centre
3. Dept. of Pure & Applied Chemistry
4. University of Strathclyde
5. Glasgow
6. Faculté de Chimie
7. Université Pierre et Marie Curie
8. 75252 Cedex 05
9. France
10. Analytical Chemistry Department
11. Faculty of Pharmacy
12. Helwan University
13. Cairo
14. Egypt