Electrode for electrochemical sensors

Details Electrode for electrochemical sensors Electrode for electrochemical sensors

G - Physics

01

N

26/112, 324/23

G01N 27/30 (2006.01) C12Q 1/00 (2006.01) G01N 27/49 (2006.01) G01N 33/487 (2006.01)

Patent

CA 1250019

ELECTRODE FOR ELECTROCHEMICAL SENSORS Abstract of the Disclosure A disposable, inexpensive electrode for an electrochemical sensor includes a laminat- ed anode and a laminated cathode. The anode is a film substrate with anodic material such as platinum deposited on the substrate. The cathode is also a film substrate with cathodic material such as silver deposited on the substrate. The anode and cathode can be laminated with an inter- mediate layer of dielectric material. A working surface is provided on the electrode and defined, in part, by the anode and cathode. One pro- cedure for defining the working surface is to fabricate spaced openings in the cathode film and the layer of dielectric material. The openings in the cathode film and dielectrical layer are aligned and the exposed surfaces of the anode and cathode define the working area. An enzyme, such as glucose oxidase, is bonded to the exposed anode and a membrane is applied over the working area and enzyme. The membrane is preferably a silicone water-based elastomer. The laminated anode, cathode and dielectric layer are then severed to form individual electrodes each in- cluding a working area.

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