The best analytical parameters were obtained for the electrode formed in the electrolyte with pH 1 by the CV method and dried at 60 0 C. It shows the best catalytic and mechanical properties. To improve the sensitivity of the electrode, we increased the enzyme content on its surface by the increasing the concentration of enzymes in solutions that modified the electrodes. The optimal concentration of enzymes is 2 mg/ml (Fig. ). At higher enzyme concentrations, steric hindrance may be involved and results worsened. Calibration curve obtained for glucose in PB buffer at potential of 0.45 V vs.