CH282769A - Appareil pour la détermination du pH d'un liquide. - Google Patents

Appareil pour la détermination du pH d'un liquide.

Info

Publication number
CH282769A
CH282769A CH282769DA CH282769A CH 282769 A CH282769 A CH 282769A CH 282769D A CH282769D A CH 282769DA CH 282769 A CH282769 A CH 282769A
Authority
CH
Switzerland
Prior art keywords
determining
liquid
Prior art date
Application number
Other languages
English (en)
French (fr)
Inventor
Societe Thermide Et Thermiques
Original Assignee
Thermide Etudes Et Realisation
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 Thermide Etudes Et Realisation filed Critical Thermide Etudes Et Realisation
Publication of CH282769A publication Critical patent/CH282769A/fr

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)
CH282769D 1949-02-10 1950-02-09 Appareil pour la détermination du pH d'un liquide. CH282769A (fr)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
CH282769A true CH282769A (fr) 1952-05-15

Family

ID=9284149

Family Applications (1)

Application Number Title Priority Date Filing Date
CH282769D CH282769A (fr) 1949-02-10 1950-02-09 Appareil pour la détermination du pH d'un liquide.

Country Status (6)

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

Also Published As

Publication number Publication date
FR1011452A (fr) 1952-06-23
GB668236A (en) 1952-03-12
BE493805A (ko)
NL77461C (ko)
DE829230C (de) 1952-01-24

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