Effects of organic matter on the pulse voltammetric speciation of copper

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Abstract
In the pulse voltammetric speciation of copper in the presence of organic matter, the copper peak is often accompanied by a shoulder that in a voltammetric copper titration, may grow out to a subsidiary peak. The nature of the double peak has been investigated for copper/organic matter systems, using square wave voltammetry and pulse forms of stripping voltammetry. It is concluded that due to adsorption of organic ligands at the mercury/solution, interface, both the oxidation and the reduction process of copper at the electrode are affected, each in a different way, giving rise to a splitting up of the pulse voltammetric current response peak.