An apparatus for quantitatively determining an analyte in a sample fluid includes a holder for
holding an electrochemical cell that includes a catalyst, a waveform generator for generating
a potential profile having a voltage bias and an alternating part, a detector for detecting a
current signal for a period of measuring time through the electrochemical cell, a memory for
storing the current signal, and a processor for correlating the current signals with the
concentration of the analyte.

A method and an apparatus for electrochemical detec tion 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 gen erated between the electrolyte and the working …