Bubbles of CO2 were obtained during the alcohols'oxidation followed by the decrease of repeatability.
It was necessary to remove any remaining CO2 bubbles from the gold working electrode surface To solve this problem, it was essential to mix the electrolyte solution.
Three techniques of electrolyte solution mixing were studied: an ultrasonic mixing, a magnetic stirrer and vibration.
The magnetic stirrer was chosen as the most appropriate for further experiments. In this case any remaining CO2 bubbles were removed from the electrode surface and the highest repeatability was observed (RSD 7 and 5% for methanol and ethanol,
respectively).