Invention is used in the medical field for the analysis of biological solutions, for purposes of diagnostics and in the microbiology industry. For the production of a ferment electrode, a cytochrome b2 is adsorbed on the carbon electrode glass surface modified by the PM-75 soot. Before modification of the soot, nitric acid is oxidised and dispersed in an acetone suspension that has 2-5 percent of the soot. The invention ensures a simplification of the glass carbon electrode modification; reduction of the operational potential of the ferment electrode, increase selectivity of the same; increase it's sensitivity that enables it to use heavily diluted biological solutions.
