FR1011452A - Appareil pour la détermination du ph - Google Patents

Appareil pour la détermination du ph

Info

Publication number
FR1011452A
FR1011452A FR1011452DA FR1011452A FR 1011452 A FR1011452 A FR 1011452A FR 1011452D A FR1011452D A FR 1011452DA FR 1011452 A FR1011452 A FR 1011452A
Authority
FR
France
Prior art keywords
determination
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.)
Expired
Application number
Other languages
English (en)
Inventor
Frederic Guigues
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 filed Critical
Application granted granted Critical
Publication of FR1011452A publication Critical patent/FR1011452A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection
    • G01N21/293—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection with colour charts, graduated scales or turrets
    • 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
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • G01N21/80—Indicating pH value

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (AREA)
  • Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Spectrometry And Color Measurement (AREA)
FR1011452D 1949-02-10 1949-02-10 Appareil pour la détermination du ph Expired FR1011452A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR829230X 1949-02-10

Publications (1)

Publication Number Publication Date
FR1011452A true FR1011452A (fr) 1952-06-23

Family

ID=9284149

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1011452D Expired FR1011452A (fr) 1949-02-10 1949-02-10 Appareil pour la détermination du ph

Country Status (6)

Country Link
BE (1) BE493805A (fr)
CH (1) CH282769A (fr)
DE (1) DE829230C (fr)
FR (1) FR1011452A (fr)
GB (1) GB668236A (fr)
NL (1) NL77461C (fr)

Also Published As

Publication number Publication date
GB668236A (en) 1952-03-12
NL77461C (fr)
BE493805A (fr)
CH282769A (fr) 1952-05-15
DE829230C (de) 1952-01-24

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