Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1994-02-15
1996-07-30
Bell, Bruce F.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204403, 204415, 205198, 205317, 435817, 4352872, 4352879, 422 8203, G01N 2726
Patent
active
055408281
ABSTRACT:
A method for making a sensing element for use in a sensor or biosensor that amperometrically measures the concentration of an analyte in a liquid, includes the following sequential steps: a) obtaining an electrode; b) immersing the electrode in a solution of monomer that is capable of being electropolymerized into an electrically insulating polymer; c) flowing an electric current from a cathode through the solution to the electrode at a voltage and amperage sufficient to cause the monomer to polymerize on the surface of the electrode, thereby yielding an electrode coated with an adherent layer of electrically insulating polymer; and e) impregnating the polymeric coating on the surface with a sensing agent that is capable, when contacted by a specific analyte in a chemical or biological liquid, of generating an electroactive molecule that can be detected amperometrically.
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