US4662996A
Expired / Lapsed
US
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Method and electrochemical sensor for sensing chemical agents using a sensing elctrode coated with electrically conductive polymers
Assignee: Honeywell Inc
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Filing: 1985-12-20
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Granted: 1987-05-05
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Expires: 2005-12-20
Abstract
Abstract An electrochemical method and apparatus for detecting polar toxic species is disclosed which uses a conductive polymer coated sensing electrode. The conductive polymers may be polyquinoline or substituted polyquinolines.
Inventors
- 👤 H. V. Venkatasetty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:04
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N27/4045
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
154 words
A method of detecting the presence of polar chemical agents or toxic species of interest comprising the steps of: providing an electrochemical cell means including energizing means having an electrode configuration comprising a plurality of electrodes including a noble metal counter electrode, an Ag/Ag + reference electrode and a working electrode further comprising a core of the same noble metal as the counter electrode coated with a layer of a conducting polymer having reversible Redox characteristics, said cell further including a nonaqueous gelled aprotic electrolyte solution in the electrochemical cell means, said solution comprising an aprotic organic solvent and an electrolyte salt; exposing the electrochemical cell means to an atmosphere suspected of containing a species of interest; measuring the potential between the working and reference electrodes to identify the species of interest; and measuring the current flowing between said sensing electrode and said counter electrode to determine the concentration of said species of interest.
Claim 2
Independent Claim
154 words
A method of detecting the presence of polar chemical agents or toxic species of interest comprising the steps of: providing an electrochemical cell means including energizing means having an electrode configuration comprising a plurality of electrodes including a noble metal counter electrode, an Ag/Ag + reference electrode and a working electrode further comprising a core of the same noble metal as the counter electrode coated with a layer of a conducting polymer having reversible Redox characteristics, said cell further including a nonaqueous gelled aprotic electrolyte solution in the electrochemical cell means, said solution comprising an aprotic organic solvent and an electrolyte salt; exposing the electrochemical cell means to an atmosphere suspected of containing a species of interest; measuring the potential between the working and reference electrodes to identify the species of interest; and measuring the current flowing between said sensing electrode and said counter electrode to determine the concentration of said species of interest.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein said noble metal is platinum.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein said electrolyte solvent is one selected from the group consisting of γ-butyrolactone and propylene carbonate, and wherein said electrolyte salt is lithium perchlorate.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein said conducting polymer is one selected from the group consisting of polyquinoline and substituted polyquinolines.
Claim 6
Dependent Claim
26 words
The method of claim 4 wherein said substituted polyquinoline is selected from the group consisting of poly-2,6-(4-phenyl) quinoline, poly-2,6-(4-chlorophenyl) quinoline, poly-2,6-(4-methoxyphenyl) quinoline, and poly-2,6-(N-methyl, 4-phenyl) quinoline.
Claim 7
Dependent Claim
12 words
The method of claim 5 wherein said substituted polyquinoline is poly-2,6-(4-phenyl) quinoline.
Claim 8
Dependent Claim
18 words
The method of claim 5 wherein said noble metal is platinum and said electrolyte said is lithium perchlorate.
Claim 9
Dependent Claim
12 words
The method of claim 7 wherein said substituted polyquinoline is poly-2,6-(4-phenyl) quinoline.
Claim 10
Dependent Claim
130 words
An electrochemical sensor for gaseous or vaporous chemical agents or toxic species detection comprising: electrochemical cell means having an electrode configuration comprising a plurality of electrodes including a noble metal counter electrode, an Ag/Ag + reference electrode and a working electrode further comprising a core of the same noble metal as the counter electrode coated with a layer of a conducting polymer having reversible Redox characteristics: a nonaqueous gelled aprotic electrolyte solution in the electrochemical cell means, said solution comprising an aprotic organic solvent and an electrolyte salt; adjustable potential electrical source means, to energize said electrochemical cell means at desired potentials, connected across said working and counter electrodes; potential measuring means connected across said working and reference electrodes; and current measuring means connected across said working and counter electrodes.
Claim 11
Dependent Claim
130 words
An electrochemical sensor for gaseous or vaporous chemical agents or toxic species detection comprising: electrochemical cell means having an electrode configuration comprising a plurality of electrodes including a noble metal counter electrode, an Ag/Ag + reference electrode and a working electrode further comprising a core of the same noble metal as the counter electrode coated with a layer of a conducting polymer having reversible Redox characteristics: a nonaqueous gelled aprotic electrolyte solution in the electrochemical cell means, said solution comprising an aprotic organic solvent and an electrolyte salt; adjustable potential electrical source means, to energize said electrochemical cell means at desired potentials, connected across said working and counter electrodes; potential measuring means connected across said working and reference electrodes; and current measuring means connected across said working and counter electrodes.
Claim 12
Dependent Claim
12 words
The electrochemical cell of claim 9 wherein said noble metal is platinum.
Claim 13
Dependent Claim
21 words
The sensor of claim 10 wherein said conducting polymer is one selected from the group consisting of polyquinoline and substituted polyquinolines.
Claim 14
Dependent Claim
26 words
The sensor of claim 11 wherein said substituted polyquinoline is selected from the group consisting of poly-2,6-(4-phenyl) quinoline, poly-2,6-(4-chlorophenyl) quinoline, poly-2,6-(4-methoxyphenyl) quinoline, and poly-2,6-(N-methyl, 4-phenyl) quinoline.
Claim 15
Dependent Claim
12 words
The sensor of claim 12 wherein said substituted polyquinoline is poly-2,6-(4-phenyl) quinoline.
Claim 16
Dependent Claim
35 words
The electrochemical cell of claim 9 wherein said nonaqueous gelled aprotic electrolyte solution comprises an aprotic organic solvent selected from the group consisting of γ-butyrolactone and propylene carbonate, and an amount of lithium perchlorate electrolyte.
Claim 17
Dependent Claim
21 words
The sensor of claim 14 wherein said conducting polymer is one selected from the group consisting of polyquinoline and substituted polyquinolines.
Claim 18
Dependent Claim
26 words
The sensor of claim 15 wherein said substituted polyquinoline is selected from the group consisting of poly-2,6-(4-phenyl) quinoline, poly-2,6-(4-chlorophenyl) quinoline, poly-2,6-(4-methoxyphenyl) quinoline, and poly-2,6-(N-methyl, 4-phenyl) quinoline.
Claim 19
Dependent Claim
12 words
The sensor of claim 16 wherein said substituted polyquinoline is poly-2,6-(4-phenyl) quinoline.
Claim 20
Dependent Claim
21 words
The sensor of claim 9 wherein said conducting polymer is one selected from the group consisting of polyquinoline and substituted polyquinolines.
Claim 21
Dependent Claim
26 words
The sensor of claim 18 wherein said substituted polyquinoline is selected from the group consisting of poly-2,6-(4-phenyl) quinoline, poly-2,6-(4-chlorophenyl) quinoline, poly-2,6-(4-methoxyphenyl) quinoline, and poly-2,6-(N-methyl, 4-phenyl) quinoline.
Claim 22
Dependent Claim
12 words
The sensor of claim 19 wherein said substituted polyquinoline is poly-2,6-(4-phenyl) quinoline.
References Cited (Backward Citations)
US4522690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |