Changes in concentration of very dilute solutions of metals, due to adsorption on the walls of the container, are well known. Earlier studies, however, have been confined to follow the changes in trace metal concentration of the solution phase with time. Characterisation of the solid surface is equally important and for such a study are needed reproducible thin layers of the ions under consideration on the particular substrate. Deposition of thin layers of copper on platinum by electrodeposition and solution evaporation of CuCl2on platinum gave comparable results on examination of the Cu 2p peaks by XPS. Solution evaporation was found successfully for the sodium glass substrate as well. However, solution evaporation could not be applied to Teflon or PVC substrates.