Glucose and lactate sensors
First Claim
Patent Images
1. A reference electrode, comprising:
- a substrate layer;
a cellulose acetate layer, formed from screen printing a paste which comprises;
(a) cellulose acetate; and
(b) an aprotic solvent, said paste having a viscosity of from about 40,000 centipose to about 350,000 centipoise; and
a membrane disposed over said cellulose acetate layer.
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Abstract
A solid state, multi-use electrochemical sensor having an electrically nonconductive substrate, a working electrode, and a semi-permeable membrane covering the working electrode. The working electrode includes an electrically conductive material adhered to a portion of the substrate. A first portion of the conductive material is covered with an electrically insulating dielectric coating, and a second portion of the conductive material is covered with an active layer. The active layer includes a catalytically active quantity of an enzyme carried by platinized carbon powder particles, which are distributed throughout the active layer. A sensor package for incorporating a sensor is provided.
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Citations
20 Claims
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1. A reference electrode, comprising:
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a substrate layer; a cellulose acetate layer, formed from screen printing a paste which comprises; (a) cellulose acetate; and (b) an aprotic solvent, said paste having a viscosity of from about 40,000 centipose to about 350,000 centipoise; and a membrane disposed over said cellulose acetate layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A reference electrode, comprising:
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a substrate layer; a dielectric layer supported by said substrate layer; a silver-silver chloride layer supported by said substrate layer; a membrane supported by said substrate layer; and
a cellulose acetate layer supported by said substrate layer, said cellulose acetate layer being formed from a cellulose acetate paste, comprising;(a) cellulose acetate; and (b) a solvent, said paste having a viscosity of from about 40,000 centipoise to about 350,000 centipoise. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A process for forming a reference electrode the process comprising the steps of:
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(a) providing a substrate layer, a dielectric layer supported by said substrate layer, a conductive strip supported by said substrate layer, and a silver-silver chloride layer supported by said conductive strip; (b) forming a paste by mixing cellulose acetate with a solvent; (c) forming a cellulose acetate layer by screen printing said paste on said silver-silver chloride layer; and (d) disposing a membrane over said cellulose acetate layer to provide said reference electrode. - View Dependent Claims (17, 18, 19, 20)
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Specification