Development and present status of an electrocatalytic glucose sensor

For the determination of glucose in body fluids the electrocatalytic sensor seems to be quite favorable, particularly for long-term intracorporeal operation. The measuring response is disturbed by the fluctuating concentrations of interfering substances that are present in body fluids. However, the disturbance can be for the most part controlled, as shown in the case of amino acids. Their marked influence on glucose oxidation is suppressed at a membrane-covered sensor electrode by using a potential step method.