METHOD AND APPARATUS FOR ELECTROCHEMICAL DETECTION

摘要

A method and an apparatus for electrochemical detection of solutions containing substances to be analyzed, by means of an electrochemical detector comprising a detector cell which includes a working electrode in contact with the solution flowing through a solution flow space of the detector cell, a measuring electrode for measuring the electrolyte potential, and an auxiliary electrode for applying a potential to the electrolyte. A potential difference required for the electrolysis is generated between the electrolyte and the working electrode by means of the auxiliary electrode. The electrolysis current generated at the working electrode is taken off as an analysis measurement value. In doing so, the instantaneous electric potential value of the electrolyte in the local region of the working electrode is measured and the working electrode potential is controlled as a function of the measured instantaneous potential value.