1. Biogeochemistry and Environmental Analytical Chemistry Research Group
2. University of Plymouth
3. Plymouth
4. UK
5. Supra-Regional Assay Service
6. Trace Element Laboratory
7. Guildford
8. Speciation and Environmental Analysis Research Group
9. Departamento de Quimica Analitica
10. Facultad de Ciencias Quimicas
11. Universidad, Complutense de Madrid
12. 28040 Madrid
13. Spain
14. Department of Chemistry
15. University of Massachusetts Amherst
16. USA