The current wave, recorded at more positive potentials in solutions containing glucose, can be ascribed to the oxidation of organic matter.
This signal showed a plateau between +500 and +550 mV (III), this being the potential window where the electronic transfer took place due to the glucose oxidation process. The oxidation of water taking place above +550 mV marked the upper limit of the working range.
Therefore, a set potential of +530 mV was chosen for carrying out the chronoamperometric measurements and recording the corresponding calibration curve for this composite-derived sensor.
In the chronoamperometric analysis, a potential of 0.0 V was initially set for 30 s, at which no redox reactions took place and the current tended to zero.