초록 ▼

A method for determining the concentration of a reduced or oxidized form of a redox species in an electrochemical cell (FIG. 10) of the kind comprising a working electrode (2) and a counter electrode (16) spaced from the working electrode such that reaction products from the counter electrode arrive

A method for determining the concentration of a reduced or oxidized form of a redox species in an electrochemical cell (FIG. 10) of the kind comprising a working electrode (2) and a counter electrode (16) spaced from the working electrode such that reaction products from the counter electrode arrive at the working electrode, the method comprising the steps (FIG. 5) of applying (21) an electric potential between the electrodes, such that the electro-oxidation of the redox species is diffusion controlled, determining the current as a function of time, estimating the magnitude of the steady state current (23), reversing the potential, again determining current as a function of time and estimating the reverse potential steady state (25).

대표청구항 ▼

[ We claim:] [1.] A method for determining the concentration of a reduced or oxidized2 form of a redox species in an electrochemical cell of the kind comprising a working electrode and a counter electrode spaced from the working electrode by a predetermined distance, said method comprising the steps

[ We claim:] [1.] A method for determining the concentration of a reduced or oxidized2 form of a redox species in an electrochemical cell of the kind comprising a working electrode and a counter electrode spaced from the working electrode by a predetermined distance, said method comprising the steps of:(a) applying an electric potential between the electrodes, wherein the electrodes are spaced so that reaction products from the counter electrode arrive at the working electrode by diffusion and wherein the potential of the working electrode is such that the rate of the electro-oxidation of the reduced form or electroreduction of the oxidised form of the redox species is diffusion controlled,(b) determining current as a function of time after application of the potential and prior to achievement of a steady state,(c) estimating the magnitude of the steady state current,(d) interrupting and reapplying, or reversing the polarity, of the potential,(e) repeating step (b) and step (c) to estimate the concentration of the reduced or oxidized form of the redox species.