US3966413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical chlorine flux monitor
Assignee: United States Department of Commerce
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Filing: 1975-09-05
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Granted: 1976-06-29
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Expires: 1995-09-05
Abstract
Abstract This apparatus for monitoring the chlorine concentration of water has a uue internal calibration capability and a high sensitivity. A water sample is mixed with a solution of potassium iodide and the reaction produces a mole of iodine for every mole of chlorine present in the water. The mixture is passed through a detection and calibration assembly wherein the iodine is detected amperometrically by a detection cell. Calibrant (known) iodine fluxes, equivalent in effect to the unknown chlorine-produced iodine fluxes, are supplied to the detection cell during calibration runs by means of an upstream calibration cell which electrolyzes the iodide (preferably added to distilled water) to iodine at flux rates given simply by the electrolyzing currents divided by Faraday's constant. An electronics package having gain and offset controls and a concentration display is provided.
Inventors
- 👤 George Marinenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:05
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N27/4045; G01N27/416; G01N27/4163; Y; Y10; Y10T; Y10T436/00; Y10T436/19; Y10T436/193333
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
153 words
Apparatus for measuring low concentration levels of chlorine in water including a self-contained calibration means comprising, means for providing a sample of water, a container of potassium iodide solution, means for mixing said sample of water and said potassium iodide solution to form a new solution, said new solution containing an amount of iodine proportional to the concentration of the chlorine in said sample of water, amperometric detecting cell means having a reference electrode and a working electrode, means for passing said new solution between said electrodes of said detecting cell means, and means for measuring the electrical current output of said detecting cell means, said calibration means comprising electrolysis cell means situated upstream of said detecting cell means for electrolyzing the potassium iodide in said new solution to iodine when operated, and means for passing said new solution through said electrolysis cell means before it is passed through said detecting cell means.
Claim 2
Dependent Claim
153 words
Apparatus for measuring low concentration levels of chlorine in water including a self-contained calibration means comprising, means for providing a sample of water, a container of potassium iodide solution, means for mixing said sample of water and said potassium iodide solution to form a new solution, said new solution containing an amount of iodine proportional to the concentration of the chlorine in said sample of water, amperometric detecting cell means having a reference electrode and a working electrode, means for passing said new solution between said electrodes of said detecting cell means, and means for measuring the electrical current output of said detecting cell means, said calibration means comprising electrolysis cell means situated upstream of said detecting cell means for electrolyzing the potassium iodide in said new solution to iodine when operated, and means for passing said new solution through said electrolysis cell means before it is passed through said detecting cell means.
Claim 3
Dependent Claim
59 words
The apparatus of claim 1 wherein said calibration means further includes a means for turning said electrolysis cell means on and off, and a means for controlling the amperage of the current fed through said electrolysis cell means when on, said cell being left off except when calibrating and said amperage being proportional to the amount of iodine generated.
Claim 4
Dependent Claim
84 words
The apparatus of claim 2 wherein said means for passing said new solution between said electrodes of said detecting cell means comprises at least a passageway in a solid plastic block, said working electrode of said detecting cell means comprising an elongated coiled wire disposed in a passageway of said at least a passageway, said plastic block having a plurality of interconnected passageways and said new solution being fed to said block via an entrance passageway and leaving said block via an exit passageway.
Claim 5
Dependent Claim
42 words
The apparatus of claim 3 wherein said electrolysis cell means has a reference electrode and a working electrode and said working electrode comprises an elongated coiled wire disposed in one of said plurality of interconnected passageways upstream of said detecting cell means.
Claim 6
Dependent Claim
36 words
The apparatus of claim 4 wherein said reference electrodes of both said cell means are situated in passageways in said plastic block which are disposed perpendicularly to said passageways in which said working electrodes are disposed.
Claim 7
Dependent Claim
58 words
The apparatus of claim 5 wherein an electrolyte is disposed in said reference electrode passageways, at least one of said interconnected passageways connecting with each of said reference electrode passageways and being perpendicular thereto being filled with silica gel to facilitate ionic transport to said electrolyte but to prevent said electrolyte from escaping from said reference electrode passageways.
References Cited (Backward Citations)
US2585811A
Cited
US3902982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |