Carbon film resistors as electrodes: Voltammetric properties and application in electroanalysis

The voltammetric properties of electrodes made from carbon film resistors o f 2 Omega have been studied and compared with those of commercially availab le glassy carbon, bi:fore and after electrochemical preconditioning in perc hloric acid. The potential window and background currents have been measure d in different aqueous solutions. Cyclic voltammetry of hexacyanoferrate(II ) oxidation has been carried out and compared with glassy carbon and diamon d film electrodes. Promising results have been obtained For the anodic stri pping voltammetry of metal ions, particularly zinc ion, without interferenc e from hydrogen evolution, and augurs well for substituting mercury electro des in stripping analysis.