METHOD FOR USE OF AN ELECTROCHEMICAL SENSOR AND ELECTRODES FORMING SAID SENSOR

The invention relates to a self-cleaning method for a working electrode of an electrochemical sensor, comprising a working electrode (23) of the micro-disc type, the counter electrode (40) thereto, a reference electrode (42) connected to a potentiostat, a generating electrode (30) made from diamond doped with boron and the counter electrode (48) thereto connected to a current source. The set of electrodes is furthermore connected to an electronic control and measuring unit (46). The method comprises the following steps: application of an anode current to the generating electrode and application of a cathode current to the generating electrode. The invention further relates to a chip (21) with a working electrode (23) and a generating electrode (30) made from diamond, partially covered with a coating (34). The chip is for integration in an electrochemical sensor for measurement of the concentration of a dissolved species in an aqueous medium. The chip has a protective coating (31) such as to prevent all direct contact between the coating (34) and the generating electrode for bringing into contact with the medium.