GB668236A - Apparatus for determining the ph of a liquid - Google Patents
Apparatus for determining the ph of a liquidInfo
- Publication number
- GB668236A GB668236A GB3278/50A GB327850A GB668236A GB 668236 A GB668236 A GB 668236A GB 3278/50 A GB3278/50 A GB 3278/50A GB 327850 A GB327850 A GB 327850A GB 668236 A GB668236 A GB 668236A
- Authority
- GB
- United Kingdom
- Prior art keywords
- indicator
- worm
- liquid
- values
- syphonic
- 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
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)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
<PICT:0668236/III/1> For the colorimetric determination of pH values, the liquid under test is drawn continuously under syphonic action through a transparent worm 5 from constant-level tank 3, an indicator, e.g. cresol red, also being continuously drawn into the worm through pipe 8 from tank 9, and a plurality of sealed tubes such as 10, 11, 12, containing a liquid coloured by the indicator to a shade the intensity of which varies progressively along the series to correspond to increasing pH values as shown by the indicator, being postioned between the convolutions such as A, B, C of the worm, so that by a simple colour matching operation the pH value is readily determined. Syphonic withdrawal is maintained by priming pipe 6.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR829230X | 1949-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB668236A true GB668236A (en) | 1952-03-12 |
Family
ID=9284149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3278/50A Expired GB668236A (en) | 1949-02-10 | 1950-02-08 | Apparatus for determining the ph of a liquid |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE493805A (en) |
| CH (1) | CH282769A (en) |
| DE (1) | DE829230C (en) |
| FR (1) | FR1011452A (en) |
| GB (1) | GB668236A (en) |
| NL (1) | NL77461C (en) |
-
0
- NL NL77461D patent/NL77461C/xx active
- BE BE493805D patent/BE493805A/xx unknown
-
1949
- 1949-02-10 FR FR1011452D patent/FR1011452A/en not_active Expired
-
1950
- 1950-02-08 GB GB3278/50A patent/GB668236A/en not_active Expired
- 1950-02-09 CH CH282769D patent/CH282769A/en unknown
- 1950-02-10 DE DES1627A patent/DE829230C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE829230C (en) | 1952-01-24 |
| FR1011452A (en) | 1952-06-23 |
| CH282769A (en) | 1952-05-15 |
| BE493805A (en) | |
| NL77461C (en) |
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