US4773970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion-sensitive electrochemical sensor and method of determining ion concentrations
Assignee: Clinical Diagnostic Systems Inc
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Filing: 1986-09-02
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Granted: 1988-09-27
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Expires: 2006-09-02
Abstract
Abstract An ion-sensitive electrochemical sensor comprises an electrode body having an ion-sensitive polymeric membrane coated thereon. The membrane comprises a water-insoluble copolymer having ion exchange sites and has a glass transition temperature greater than about 80° C. The sensor is used to determine ion concentration by contacting it with a test solution and determining the ion concentration as a function of the potential of the electrode.
Inventors
- 👤 Malcolm D. Purbrick
- 👤 Karel L. Petrak
- 👤 Derek A. Thomason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:10
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
37 words
An ion-sensitive electrochemical sensor comprising an electrode body having an ion-sensitive polymeric membrane coated thereon, wherein the membrane comprises a water-insoluble copolymer having ion-exchange sites, said copolymer having a glass transition temperature greater than about 80° C.
Claim 2
Dependent Claim
37 words
An ion-sensitive electrochemical sensor comprising an electrode body having an ion-sensitive polymeric membrane coated thereon, wherein the membrane comprises a water-insoluble copolymer having ion-exchange sites, said copolymer having a glass transition temperature greater than about 80° C.
Claim 3
Dependent Claim
13 words
A sensor according to claim 1 wherein the membrane further comprises a plasticizer.
Claim 4
Dependent Claim
23 words
A sensor according to claim 1 wherein the copolymer comprises from about 0.5 to 90% by weight of comonomer units having ion-exchange sites.
Claim 5
Dependent Claim
23 words
A sensor according to claim 3 wherein the copolymer comprises from about 5 to 25% by weight of comonomer units having ion-exchange sites.
Claim 6
Dependent Claim
18 words
A sensor according to claim 1 wherein the comonomer units having ion exchange sites contain quaternary ammonium groups.
Claim 7
Dependent Claim
21 words
A sensor according to claim 5 wherein the nitrogen atoms of the quaternary ammonium groups form part of a heterocyclic ring.
Claim 8
Dependent Claim
19 words
A sensor according to claim 6 wherein the comonomer units having ion-exchange sites are derived from vinylimidiazole and vinylpyridine.
Claim 9
Dependent Claim
16 words
A sensor according to claim 1 wherein the copolymer contains comonomer units derived from methyl methacrylate.
Claim 10
Dependent Claim
16 words
A sensor according to claim 7 wherein the copolymer contains comonomer units derived from methyl methacrylate.
Claim 11
Dependent Claim
12 words
A sensor according to claim 1 that is sensitive to surfactant ions.
Claim 12
Dependent Claim
12 words
A sensor according to claim 1 that is sensitive to halide ions.
Claim 13
Independent Claim
75 words
A method of determining the concentration of ions in an aqueous solution comprising the steps of: contacting the solution with an electrochemical sensor comprising an electrode body having an ion-sensitive polymeric membrane coated thereon, wherein the membrane comprises a water-insoluble copolymer having ion-exchange sites, said copolymer having a glass transition temperature greater than about 80° C., and determining the concentration of said ions in said solution as a function of the potential of the electrode.
Claim 14
Independent Claim
75 words
A method of determining the concentration of ions in an aqueous solution comprising the steps of: contacting the solution with an electrochemical sensor comprising an electrode body having an ion-sensitive polymeric membrane coated thereon, wherein the membrane comprises a water-insoluble copolymer having ion-exchange sites, said copolymer having a glass transition temperature greater than about 80° C., and determining the concentration of said ions in said solution as a function of the potential of the electrode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |