The electrochemical behaviour of graphite-epoxy composite electrodes with various load ratios has been investigated by means of cyclic voltammetry. The optimal proportions of the conductive load in these materials have been worked out on the basis of calculations of double-layer capacity and non-faradaic electric charge values. An optimal graphite:epoxy ratio of 60 wt.% has been obtained and electroanalytical application of the composite has been studied in ferrocyanide standard solution.