US4798655A
Expired / Lapsed
US
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Multiparameter analytical electrode structure and method of measurement
Assignee: Diamond General Development Corp
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Filing: 1987-03-19
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Granted: 1989-01-17
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Expires: 2007-03-19
Abstract
Abstract An ion sensitive electrode device and method of its use in analytical and clinical chemistry are provided for measuring the concentration of an ionizable analyte contained in an aqueous medium. The device with external circuit means includes an electrode pair adapted to be placed in electrochemical contact with the medium. The electrode pair includes a polarographically active base metal/metal oxide working electrode and a reference electrode. The external circuit means is adapted to measure the voltage generated by the electrode pair in open circuit and to measure the closed circuit current flow at a preselected impedance and including means for comparing said voltage and current flow values with predetermined reference standards to provide a third value representative of said analyte concentration.
Inventors
- 👤 Howard Diamond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:30
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/4035; A; A61; A61C; A61C19/00; A61C19/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
139 words
The electrochemical method of simultaneously or sequentially measuring in a liquid both a dissolved ionic species and a dissolved gas including the steps of: (a) providing a single polarographically active working electrode having an electrochemically active, base metal/metal oxide surface having the property of providing a stable electrochemical potential that is a quantitative measure of said ionic species and acting as a catalyst for electron transfer allowing for a quantitative polarographic or amperometric measure of said dissolved gas; (b) providing a reference electrode; (c) measuring the open circuit voltage generated by the electrode pair; (d) measuring the closed circuit current flow either in driven mode or in self-generated mode, and comparing said voltage and current values with predetermined voltage and current reference standards to provide multiple values of parameters representative of concentrations of said ionic species and dissolved gas.
Claim 2
Dependent Claim
139 words
The electrochemical method of simultaneously or sequentially measuring in a liquid both a dissolved ionic species and a dissolved gas including the steps of: (a) providing a single polarographically active working electrode having an electrochemically active, base metal/metal oxide surface having the property of providing a stable electrochemical potential that is a quantitative measure of said ionic species and acting as a catalyst for electron transfer allowing for a quantitative polarographic or amperometric measure of said dissolved gas; (b) providing a reference electrode; (c) measuring the open circuit voltage generated by the electrode pair; (d) measuring the closed circuit current flow either in driven mode or in self-generated mode, and comparing said voltage and current values with predetermined voltage and current reference standards to provide multiple values of parameters representative of concentrations of said ionic species and dissolved gas.
Claim 3
Dependent Claim
16 words
The method according to claim 1 where the working electrode is a self-renewing base metal electrode.
Claim 4
Dependent Claim
15 words
The method according to claim 1 where the working electrode is an antimony/antimony oxide electrode.
Claim 5
Dependent Claim
18 words
The method according to claim 2 where the reference electrode is a silver/silver chloride electrode or calomel electrode.
Claim 6
Dependent Claim
19 words
The method according to claim 1 where the current flow measured is that of the short circuit current flow.
Claim 7
Dependent Claim
14 words
The method according to claim 1 where the concentration of dissolved oxygen is measured.
Claim 8
Dependent Claim
14 words
The method according to claim 1 where the concentration of dissolved hydrogen is measured.
Claim 9
Dependent Claim
15 words
The method according to claim 1 where the concentration of dissolved hydrogen sulfide is measured.
Claim 10
Dependent Claim
13 words
The method according to claim 1 where the hydrogen ion concentration is measured.
Claim 11
Dependent Claim
114 words
The electrochemical method of measuring the concentration of an ionizable analyte and two dissolved gaseous analytes contained in an aqueous solution, comprising the steps of: (a) providing a base metal/metal oxide working electrode which is polarographically active in the presence of the gaseous analytes; (b) providing a reference electrode; (c) carrying out first and second measurements of the polarographic current at given first and second applied steady-state voltages, respectively, and comparing the resulting observed first and second current values with predetermined reference standards to provide two values representative of the concentrations of two gas analytes of interest; and, (d) measuring the open circuit voltage, said voltage correlatable with the concentration of the ionizable analyte.
Claim 12
Dependent Claim
114 words
The electrochemical method of measuring the concentration of an ionizable analyte and two dissolved gaseous analytes contained in an aqueous solution, comprising the steps of: (a) providing a base metal/metal oxide working electrode which is polarographically active in the presence of the gaseous analytes; (b) providing a reference electrode; (c) carrying out first and second measurements of the polarographic current at given first and second applied steady-state voltages, respectively, and comparing the resulting observed first and second current values with predetermined reference standards to provide two values representative of the concentrations of two gas analytes of interest; and, (d) measuring the open circuit voltage, said voltage correlatable with the concentration of the ionizable analyte.
Claim 13
Dependent Claim
16 words
The method according to claim 10 where the working electrode is a self-renewing base metal electrode.
Claim 14
Dependent Claim
15 words
The method according to claim 10 where the working electrode is an antimony/antimony oxide electrode.
Claim 15
Dependent Claim
18 words
The method according to claim 11 where the reference electrode is a silver/silver chloride electrode or calomel electrode.
Claim 16
Dependent Claim
13 words
The method according to claim 10 where the concentration of oxygen is measured.
Claim 17
Dependent Claim
14 words
The method according to claim 10 where the concentration of dissolved hydrogen is measured.
Claim 18
Dependent Claim
14 words
The method according to claim 10 where the concentration of hydrogen sulfide is measured.
References Cited (Backward Citations)
US2913386A
Cited
US4227974A
Cited
US4452672A
Cited
US4563263A
Cited
SU1193564A1
Cited
US4561963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |