CA2043394A1 - Amperimetric measurement with cell electrode deplating - Google Patents

Amperimetric measurement with cell electrode deplating

Info

Publication number
CA2043394A1
CA2043394A1 CA2043394A CA2043394A CA2043394A1 CA 2043394 A1 CA2043394 A1 CA 2043394A1 CA 2043394 A CA2043394 A CA 2043394A CA 2043394 A CA2043394 A CA 2043394A CA 2043394 A1 CA2043394 A1 CA 2043394A1
Authority
CA
Canada
Prior art keywords
current
cell
electrodes
reverse
amperimetric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2043394A
Other languages
French (fr)
Other versions
CA2043394C (en
Inventor
Charles J. Mina
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Capital Controls Co Inc
Original Assignee
Capital Controls Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Capital Controls Co Inc filed Critical Capital Controls Co Inc
Publication of CA2043394A1 publication Critical patent/CA2043394A1/en
Application granted granted Critical
Publication of CA2043394C publication Critical patent/CA2043394C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/49—Systems involving the determination of the current at a single specific value, or small range of values, of applied voltage for producing selective measurement of one or more particular ionic species
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/22—Measuring resistance of fluids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/50—Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature

Abstract

In an amperimetric measurement apparatus comprising an amperimetric cell having a pair of electrodes arranged for contact with a solution, a potential difference is established between the electrodes, and a corresponding electric current is conducted in a forward direction through a current path which includes the electrodes and the solution. An output corresponding to the current indicates the concentration of a solute in the solution.
The electrical charge passing through said cell in response to said potential difference is monitored by an integrator. The forward current is interrupted repeatedly and a reverse electric current is imposed on the cell during the interruptions of forward current. The magnitude and duration of the reverse current are regulated in response to the electrical charge flow corresponding to the forward current, so that the net flow of charge through the cell over a time period including an equal number of intervals of forward and reverse current intervals is substantially zero.
Consequently, ionic contaminants, which tend to be plated onto cell electrodes as a result of the forward current are removed substantially completely by deplating, without the risk of producing inaccurate measurements by placing the cell in a reverse charging condition.
CA002043394A 1990-05-31 1991-05-28 Amperimetric measurement with cell electrode deplating Expired - Fee Related CA2043394C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/531,047 US5059908A (en) 1990-05-31 1990-05-31 Amperimetric measurement with cell electrode deplating
US531,047 1990-05-31

Publications (2)

Publication Number Publication Date
CA2043394A1 true CA2043394A1 (en) 1991-12-01
CA2043394C CA2043394C (en) 1995-12-05

Family

ID=24116022

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002043394A Expired - Fee Related CA2043394C (en) 1990-05-31 1991-05-28 Amperimetric measurement with cell electrode deplating

Country Status (4)

Country Link
US (1) US5059908A (en)
EP (1) EP0459782B1 (en)
CA (1) CA2043394C (en)
DE (1) DE69121473T2 (en)

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Also Published As

Publication number Publication date
EP0459782A3 (en) 1993-10-20
EP0459782B1 (en) 1996-08-21
DE69121473T2 (en) 1997-01-23
US5059908A (en) 1991-10-22
EP0459782A2 (en) 1991-12-04
DE69121473D1 (en) 1996-09-26
CA2043394C (en) 1995-12-05

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