Adsorption of organic anions on iron in aqueous solutions: An ellipsometric study

Adsorption of anions of higher aromatic amino acids on the surface of iron from aqueous solutions is studied by an ellipsometric method concurrently with electrochemical measurements. It is demonstrated that ellipsometry is an effective method for studying in situ regularities governing the adsorption of anions of organic acids on the surface of metallic electrodes. Variations of ellipsometric parameters with the adsorbate concentration make it possible to obtain adsorption isotherms and determine adsorption characteristics.