CA2305201A1 - Determination of anionic species concentration by near infrared spectroscopy - Google Patents

Determination of anionic species concentration by near infrared spectroscopy Download PDF

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Publication number
CA2305201A1
CA2305201A1 CA002305201A CA2305201A CA2305201A1 CA 2305201 A1 CA2305201 A1 CA 2305201A1 CA 002305201 A CA002305201 A CA 002305201A CA 2305201 A CA2305201 A CA 2305201A CA 2305201 A1 CA2305201 A1 CA 2305201A1
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CA
Canada
Prior art keywords
anionic species
spectral data
solution
determination
near infrared
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
CA002305201A
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French (fr)
Other versions
CA2305201C (en
Inventor
Michael Kester
Denys F. Leclerc
Thanh P. Trung
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FPInnovations
Aker Solutions Canada Inc
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Individual
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Publication date
Priority claimed from CA002220913A external-priority patent/CA2220913C/en
Application filed by Individual filed Critical Individual
Priority to CA002305201A priority Critical patent/CA2305201C/en
Publication of CA2305201A1 publication Critical patent/CA2305201A1/en
Application granted granted Critical
Publication of CA2305201C publication Critical patent/CA2305201C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Paper (AREA)

Abstract

A method for determining the concentration of anionic species selected from the group consisting of OH-, CO3= and HS- and of organic species in an aqueous sample solution, said method comprising subjecting said solution to near infrared radiation at a wavelength region of wave numbers selected from about 7,000 to 14,000 cm-1 through a solution path length of at least 3 mm to obtain spectral data for said solution; obtaining comparative spectral data for said anionic species at known concentrations in aqueous solutions; and correlating by multivariate calibration the relationships between said spectral data of said sample solution and said comparative spectral data to determine said concentration of said anionic species in said sample solution. The method is of particular value for use with pulp liquor determination and control in regards to the rapid and accurate determination of the OH-, HS- and CO3=
anionic species and of organic species present in pulp liquor.
CA002305201A 1997-11-12 1998-11-03 Determination of anionic species concentration by near infrared spectroscopy Expired - Lifetime CA2305201C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002305201A CA2305201C (en) 1997-11-12 1998-11-03 Determination of anionic species concentration by near infrared spectroscopy

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA002220913A CA2220913C (en) 1997-11-12 1997-11-12 Determination of anionic species concentration by near infrared spectroscopy
CA2,220,913 1997-11-12
PCT/CA1998/001024 WO1999024815A1 (en) 1997-11-12 1998-11-03 Determination of anionic species concentration by near infrared spectroscopy
CA002305201A CA2305201C (en) 1997-11-12 1998-11-03 Determination of anionic species concentration by near infrared spectroscopy

Publications (2)

Publication Number Publication Date
CA2305201A1 true CA2305201A1 (en) 1999-05-20
CA2305201C CA2305201C (en) 2003-02-18

Family

ID=25679818

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002305201A Expired - Lifetime CA2305201C (en) 1997-11-12 1998-11-03 Determination of anionic species concentration by near infrared spectroscopy

Country Status (1)

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CA (1) CA2305201C (en)

Also Published As

Publication number Publication date
CA2305201C (en) 2003-02-18

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