US5217112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltametric analysis apparatus and method
Assignee: Individual
•
Filing: 1991-09-04
•
Granted: 1993-06-08
•
Expires: 2011-09-04
Abstract
Abstract An apparatus and method for electrochemical analysis of elements in solution. An auxiliary electrode 14, a reference electrode 18, and five working electrodes 20, 22, 26, 28, and 30 are positioned in a container 12 containing a sample solution 34. The working electrodes are spaced apart evenly from each other and auxiliary electrode 14 to minimize any inter-electrode interference that may occur during analysis. An electric potential is applied between auxiliary electrode 14 and each of the working electrodes 20, 22, 26, 28, and 30. Simultaneous measurements taken of the current flow through each of the working electrodes for each given potential in a potential range are used for identifying chemical elements present in sample solution 34 and their respective concentrations. Multiple working electrodes enable a more positive identification to be made by providing unique data characteristic of chemical elements present in the sample solution.
Inventors
- 👤 Amy C. Almon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:39
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/49; G01N27/27
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
162 words
Apparatus for analyzing at least one chemical element carried by a solution, said apparatus for use in electrochemical analysis, said apparatus comprising: an electrolytic cell dimensioned to hold said solution; an auxiliary electrode positioned in said cell; at least five working electrodes positioned in said cell, said at least five working electrodes spaced apart from said auxiliary electrode and each other, each of said at least five working electrodes composed of a different material thereby enabling at least five unique sets of electrochemical data to be generated for said at least one chemical element present in said solution; each of the first five of said at least five working electrodes being made of one material selected from the group consisting of carbon, gold, nickel, platinum, and silver; means for applying an electrical potential between said auxiliary electrode and each of said at least five working electrodes; and means for measuring electrical current flowing through each of said at least five working electrodes.
Claim 2
Dependent Claim
162 words
Apparatus for analyzing at least one chemical element carried by a solution, said apparatus for use in electrochemical analysis, said apparatus comprising: an electrolytic cell dimensioned to hold said solution; an auxiliary electrode positioned in said cell; at least five working electrodes positioned in said cell, said at least five working electrodes spaced apart from said auxiliary electrode and each other, each of said at least five working electrodes composed of a different material thereby enabling at least five unique sets of electrochemical data to be generated for said at least one chemical element present in said solution; each of the first five of said at least five working electrodes being made of one material selected from the group consisting of carbon, gold, nickel, platinum, and silver; means for applying an electrical potential between said auxiliary electrode and each of said at least five working electrodes; and means for measuring electrical current flowing through each of said at least five working electrodes.
Claim 3
Dependent Claim
28 words
The apparatus as recited in claim 1, wherein said at least five working electrodes are each spaced an equal distance from said auxiliary electrode and from each other.
Claim 4
Independent Claim
113 words
A method for analyzing at least one chemical element, said method comprising the steps of: positioning an auxiliary electrode and five working electrodes in a solution carrying said at least one chemical element to be analyzed, said five working electrodes being spaced apart from said auxiliary electrode and each other, said five working electrodes being made of a material selected from the group consisting of carbon, gold, nickel, platinum, and silver; and no two of said five working electrodes being made of the same material; simultaneously applying an electrical potential between said auxiliary electrode and each of said five working electrodes; and measuring electrical current flowing through each of said five working electrodes.
Claim 5
Independent Claim
113 words
A method for analyzing at least one chemical element, said method comprising the steps of: positioning an auxiliary electrode and five working electrodes in a solution carrying said at least one chemical element to be analyzed, said five working electrodes being spaced apart from said auxiliary electrode and each other, said five working electrodes being made of a material selected from the group consisting of carbon, gold, nickel, platinum, and silver; and no two of said five working electrodes being made of the same material; simultaneously applying an electrical potential between said auxiliary electrode and each of said five working electrodes; and measuring electrical current flowing through each of said five working electrodes.
Claim 6
Dependent Claim
29 words
The method as recited in claim 3, wherein said positioning step further comprises spacing said five working electrodes an equal distance from said auxiliary electrode and from each other.
Claim 7
Dependent Claim
31 words
The method as recited in claim 3, further comprising the step of varying said potential incrementally within a potential range so that said current through each of said five electrodes changes.
References Cited (Backward Citations)
US2531747A
Cited
US3428532A
Cited
US3556950A
Cited
US3714012A
Cited
US3902982A
Cited
US3859193A
Cited
US4049525A
Cited
US4233031A
Cited
US4786373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |