US4522690A
Expired / Lapsed
US
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Electrochemical sensing of carbon monoxide
Assignee: Honeywell Inc
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Filing: 1983-12-01
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Granted: 1985-06-11
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Expires: 2003-12-01
Abstract
Abstract Apparatus and method for an electrochemical sensor for carbon monoxide detection in a gelled aprotic organic nonaqueous electrolyte solution.
Inventors
- 👤 Hanumanthaiya V. Venkatasetty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:47
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N27/4045
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
133 words
A method for detecting the presence of a plurality of toxic agents comprising the steps of: providing electrochemical cell means having an electrode configuration comprising a plurality of electrodes including a platinum working electrode, a platinum counter electrode and an Ag/Ag + reference electrode; providing a nonaqueous gelled aprotic electrolyte solution in the electrochemical cell means, said solution comprising an aprotic organic solvent selected from the group consisting of γ-butyrolactone and propylene carbonate, an amount of lithium perchlorate electrolyte and polyethylene oxide gelling agent; exposing the electrochemical cell means to an atmosphere suspected of containing the gas of interest; providing electrical source means and connecting the source means to the electrode configuration to energize the cell means; and providing means for measuring the current flowing between said sensing electrode and said counter electrode.
Claim 2
Independent Claim
133 words
A method for detecting the presence of a plurality of toxic agents comprising the steps of: providing electrochemical cell means having an electrode configuration comprising a plurality of electrodes including a platinum working electrode, a platinum counter electrode and an Ag/Ag + reference electrode; providing a nonaqueous gelled aprotic electrolyte solution in the electrochemical cell means, said solution comprising an aprotic organic solvent selected from the group consisting of γ-butyrolactone and propylene carbonate, an amount of lithium perchlorate electrolyte and polyethylene oxide gelling agent; exposing the electrochemical cell means to an atmosphere suspected of containing the gas of interest; providing electrical source means and connecting the source means to the electrode configuration to energize the cell means; and providing means for measuring the current flowing between said sensing electrode and said counter electrode.
Claim 3
Dependent Claim
110 words
An electrochemical sensor for toxic gas detection comprising: electrochemical cell means having therein an electrode configuration comprising a plurality of electrodes including a platinum working electrode, a platinum counter electrode and an Ag/Ag + reference electrode; a nonaqueous gelled aprotic electrolyte solution in said cell means, said electrolyte solution comprising an aprotic organic solvent selected from the group consisting of γ-butyrolactone and propylene carbonate, an amount of lithium perchlorate electrolyte and an amount of polyethylene oxide gelling agent; adjustable potential electrical source means, to energize said electrochemical cell means at desired potentials, connected across said working and counter electrodes; and current measuring means connected across said working and counter electrodes.
Claim 4
Dependent Claim
110 words
An electrochemical sensor for toxic gas detection comprising: electrochemical cell means having therein an electrode configuration comprising a plurality of electrodes including a platinum working electrode, a platinum counter electrode and an Ag/Ag + reference electrode; a nonaqueous gelled aprotic electrolyte solution in said cell means, said electrolyte solution comprising an aprotic organic solvent selected from the group consisting of γ-butyrolactone and propylene carbonate, an amount of lithium perchlorate electrolyte and an amount of polyethylene oxide gelling agent; adjustable potential electrical source means, to energize said electrochemical cell means at desired potentials, connected across said working and counter electrodes; and current measuring means connected across said working and counter electrodes.
Claim 5
Dependent Claim
12 words
The sensor of claim 2 wherein the nonaqueous electrolyte solvent is γ-butyrolactone.
Claim 6
Dependent Claim
14 words
The sensor of claim 3 wherein the concentration of lithium perchlorate is about 1.0M.
Claim 7
Dependent Claim
24 words
The sensor of claim 4 wherein the amount of said polyethylene oxide is about 1% by weight based on the weight of the solution.
Claim 8
Dependent Claim
14 words
The sensor of claim 5 wherein said toxic gas to be detected is CO.
Claim 9
Dependent Claim
20 words
The sensor of claim 2 wherein said working and counter electrodes are in the form of a thin platinum film.
Claim 10
Dependent Claim
13 words
The sensor of claim 2 wherein the nonaqueous electrolyte solvent is propylene carbonate.
Claim 11
Dependent Claim
14 words
The sensor of claim 8 wherein the concentration of the electrolyte is about 0.75M.
Claim 12
Dependent Claim
24 words
The sensor of claim 9 wherein the amount of said polyethylene oxide is about 1% by weight based on the weight of the solution.
Claim 13
Dependent Claim
14 words
The sensor of claim 10 wherein said toxic gas to be detected is CO.
Claim 14
Dependent Claim
117 words
An electrochemical sensor for toxic gas detection comprising: electrochemical cell means having therein an electrode configuration comprising a plurality of electrodes including a platinum electrode working, a platinum counter electrode and an Ag/Ag + reference electrode; a nonaqueous gelled aprotic electrolyte solution in said cell means, said solution comprising an aprotic organic solvent selected from the group consisting of γ-butyrolactone and propylene carbonate, an electrolyte comprising an amount of lithium perchlorate and an amount of tetraethylammonium perchlorate and an amount of polyethylene oxide gelling agent; adjustable potential electrical source means, to energize said electrochemical cell means at desired potentials, connected across said working and counter electrodes; and current measuring means connected across said working and counter electrodes.
Claim 15
Dependent Claim
117 words
An electrochemical sensor for toxic gas detection comprising: electrochemical cell means having therein an electrode configuration comprising a plurality of electrodes including a platinum electrode working, a platinum counter electrode and an Ag/Ag + reference electrode; a nonaqueous gelled aprotic electrolyte solution in said cell means, said solution comprising an aprotic organic solvent selected from the group consisting of γ-butyrolactone and propylene carbonate, an electrolyte comprising an amount of lithium perchlorate and an amount of tetraethylammonium perchlorate and an amount of polyethylene oxide gelling agent; adjustable potential electrical source means, to energize said electrochemical cell means at desired potentials, connected across said working and counter electrodes; and current measuring means connected across said working and counter electrodes.
Claim 16
Dependent Claim
12 words
The sensor of claim 12 wherein the non-aqueous electrolyte solvent is γ-butyrolactone.
Claim 17
Dependent Claim
15 words
The sensor of claim 13 wherein the concentration of said tetraethylammonium perchlorate is about 0.1M.
Claim 18
Dependent Claim
24 words
The sensor of claim 14 wherein the amount of said polyethylene oxide is about 1% by weight based on the weight of the solution.
Claim 19
Dependent Claim
14 words
The sensor of claim 14 wherein the toxic gas to be detected is CO.
Claim 20
Dependent Claim
20 words
The sensor of claim 12 wherein said working and counter electrodes are in the form of a thin platinum film.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |