Patent ID: 6413410
Filing Date: 2002-07-02
Classification: C12Q,G01N,Y10T

Abstract:
A method for determining the concentration of a reduced or oxidized form of a redox species in an electrochemical cell, said method comprising the steps of:providing an electrochemical cell having a working electrode and a counter electrode; allowing ingress of a sample into the electrochemical cell, the sample substantially covering the working electrode aid the counter electrode; applying an electric potential difference between the electrodes sufficient to oxidize or reduce the redox species at the working electrode, thereby producing a reduced or oxidized form of the redox species; depleting the reduced or oxidized form of the redox species in the sample by oxidizing or reducing it at the working electrode; and thereafter measuring a charge passed at the working electrode, the charge indicative of the amount of reduced or oxidized form of the redox species depleted in the sample.