| 摘要 |
The invention relates to a method for compensation of the potential drift of a reference electrode (RE) in electrochemical measurements of concentrations of at least one dissolved chemical entity in a liquid medium by means of a counter electrode (CE) and a working electrode (WE) and a reference electrode (RE), said method comprising applying at least one measurement potential (E) on the working electrode (WE) relative to said reference electrode corresponding to a measurement voltage U, during at least a part of a measurement period, at which said dissolved chemical entity is subjected to an electrochemical reaction at said working electrode (WE), said reaction resulting in a measurement evoked current, said method comprising the steps of: registering the measurement evoked current IpO2, comparison of the measurement evoked current IpO2 with a predetermined value Iset, decreasing or increasing the voltage U with a value dU in negative or positive incremental steps such that the measurement current IpO2 approaches Iset. The invention also relates to an apparatus for performing such measurements and an active implant having device and the method implemented therein. |
