CA2362568A1 - Multi-electrode composition measuring device and method - Google Patents

Multi-electrode composition measuring device and method Download PDF

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Publication number
CA2362568A1
CA2362568A1 CA002362568A CA2362568A CA2362568A1 CA 2362568 A1 CA2362568 A1 CA 2362568A1 CA 002362568 A CA002362568 A CA 002362568A CA 2362568 A CA2362568 A CA 2362568A CA 2362568 A1 CA2362568 A1 CA 2362568A1
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CA
Canada
Prior art keywords
electrode
liquor
components
wave potential
measuring device
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
CA002362568A
Other languages
French (fr)
Other versions
CA2362568C (en
Inventor
Ord Millar
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.)
Honeywell International Inc
Original Assignee
Ord Millar
Honeywell-Measurex Corporation
Honeywell Inc.
Honeywell International 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 Ord Millar, Honeywell-Measurex Corporation, Honeywell Inc., Honeywell International Inc. filed Critical Ord Millar
Publication of CA2362568A1 publication Critical patent/CA2362568A1/en
Application granted granted Critical
Publication of CA2362568C publication Critical patent/CA2362568C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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

Abstract

The Applicant's invention comprises an apparatus and method for determining the amount of one or more components in a pulping liquor. At a first electrode, a varying voltage is supplied in a voltage range including the half-wave potential of each component of a liquor to be measured, and accounting for variations in the half-wave potential caused by changing process parameters. At a second electrode, which is roughly 1/3 to ? the size of the first electrode, the derivative of current intensity is monitored near the known half-wave potential for the various liquor components. Using curve-fitting means, the derivative of current intensity and selected other process condition data is used to determine concentrations of the various liquor components.
CA002362568A 1999-02-26 2000-02-22 Multi-electrode composition measuring device and method Expired - Fee Related CA2362568C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/258,550 1999-02-26
US09/258,550 US6416651B1 (en) 1999-02-26 1999-02-26 Multi-electrode composition measuring device and method
PCT/US2000/004525 WO2000050882A1 (en) 1999-02-26 2000-02-22 Multi-electrode composition measuring device and method

Publications (2)

Publication Number Publication Date
CA2362568A1 true CA2362568A1 (en) 2000-08-31
CA2362568C CA2362568C (en) 2007-10-30

Family

ID=22981060

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002362568A Expired - Fee Related CA2362568C (en) 1999-02-26 2000-02-22 Multi-electrode composition measuring device and method

Country Status (6)

Country Link
US (1) US6416651B1 (en)
EP (1) EP1155312B1 (en)
JP (1) JP4531989B2 (en)
CA (1) CA2362568C (en)
DE (1) DE60040208D1 (en)
WO (1) WO2000050882A1 (en)

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Also Published As

Publication number Publication date
EP1155312A1 (en) 2001-11-21
EP1155312B1 (en) 2008-09-10
JP2002538428A (en) 2002-11-12
DE60040208D1 (en) 2008-10-23
CA2362568C (en) 2007-10-30
JP4531989B2 (en) 2010-08-25
WO2000050882A1 (en) 2000-08-31
US6416651B1 (en) 2002-07-09

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Effective date: 20180222