06284125 is referenced by 259 patents and cites 102 patents.

A method for determining the concentration of a reduced (or oxidised) 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: (1) applying an electric potential difference between the electrodes; (2) selecting the potential of the working electrode such that the rate of electro-oxidation of the reduced form (or electro-reduction of the oxidised form) of the species is diffusion controlled, (3) selecting the spacing between the working electrode and the counter electrode so that reaction products from the counter electrode arrive at the working electrode; (4) determining current as a function of time after application of the potential and prior to achievement of a steady state; (5) estimating the magnitude of the steady state current, and (6) obtaining from the change in current with time and the magnitude of the steady state current, a value indicative of the diffusion coefficient and/or of the concentration of the reduced form (or the oxidised form) of the species. Also disclosed is an apparatus for determining the concentration of a redox species in an electrochemical cell comprising: an electrochemical cell having a working electrode and a counter (or counter/reference) electrode, means for applying and electric potential difference between said electrodes, means for measuring the change in current with time, and characterised in that the working electrode is spaced from the counter electrode by less than 500 &mgr;m.

Title
Electrochemical cell
Application Number
8/981385
Publication Number
6284125 (B1)
Application Date
April 17, 1998
Publication Date
September 4, 2001
Inventor
Oddvar Johansen
Mulgrawe
US
Thomas William Beck
New South Wales
US
Alastair McIndoe Hodges
San Diego
US
Agent
Knobbe Martens Olson and Bear
US
Assignee
USF Filtration and Separations Group
MD, US
IPC
G01N 27/26
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