GB678303A - Improvements in and relating to apparatus for the analysis of mixtures of substances, by means of radiations - Google Patents
Improvements in and relating to apparatus for the analysis of mixtures of substances, by means of radiationsInfo
- Publication number
- GB678303A GB678303A GB29710/49A GB2971049A GB678303A GB 678303 A GB678303 A GB 678303A GB 29710/49 A GB29710/49 A GB 29710/49A GB 2971049 A GB2971049 A GB 2971049A GB 678303 A GB678303 A GB 678303A
- Authority
- GB
- United Kingdom
- Prior art keywords
- substance
- quadrants
- detectors
- chamber
- filter
- 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
- 239000000126 substance Substances 0.000 title abstract 7
- 230000005855 radiation Effects 0.000 title abstract 3
- 239000000203 mixture Substances 0.000 title 1
- 239000007789 gas Substances 0.000 abstract 2
- 239000000020 Nitrocellulose Substances 0.000 abstract 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 229920001220 nitrocellulos Polymers 0.000 abstract 1
- 229940079938 nitrocellulose Drugs 0.000 abstract 1
- 239000006100 radiation absorber Substances 0.000 abstract 1
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
- G01N21/31—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
- G01N21/37—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using pneumatic detection
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
<PICT:0678303/III/1> In improved apparatus for analyzing gases or liquids by their characteristic absorbtions in which radiation from a source 1 passes through a test chamber 7 and a comparison chamber 6 to a pair of detectors 8, 8 unbalance of which is amplified at 9, a hollow transparent filter 4 composed of four quadrants two 14, 14, Fig. 2, of which contain the substance being tested for and the others 15, 15 being empty, is rotated in the radiation path either before or after the chambers 6, 7. The effect of this filter is to impart an intermittent interruption only to those wavelengths which the substance being tested normally absorbs. Amplifier 9 responds only to the alternating current unbalance of the detectors so that instrument 10 indicates directly the proportion of the test substance in the test chamber. Where chamber 7 contains two substances whose absorbtion bands overlap, the other two quadrants of the filter may be filled with this substance, the signals due to the two pairs of quadrants being distinguished by their phase relationship. A number of such filters may be used to detect a number of substances. The detectors may be thermo-elements, bolometers, photo-sensitive elements or photo-electric cells or a thin dark radiation absorber, e.g. a nitro-cellulose film may cause the expansion of gas near it which affects in turn the electrode of a membrane condenser.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1003527T | 1947-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB678303A true GB678303A (en) | 1952-09-03 |
Family
ID=10295874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29710/49A Expired GB678303A (en) | 1947-01-17 | 1949-11-21 | Improvements in and relating to apparatus for the analysis of mixtures of substances, by means of radiations |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE828604C (en) |
| FR (1) | FR1003527A (en) |
| GB (1) | GB678303A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE976290C (en) * | 1952-06-24 | 1963-06-12 | Perkin Elmer Corp | Gas analyzer |
| DE3137659A1 (en) * | 1981-09-22 | 1983-04-07 | H. Maihak Ag, 2000 Hamburg | METHOD AND DEVICE FOR MEASURING THE CONCENTRATION OF AN IR, NIR, VIS OR UV RADIATION-ABSORBING GAS IN A GAS MATRIX |
| IT1178645B (en) * | 1983-12-30 | 1987-09-09 | Mine Safety Appliances Co | INFRARED ANALYZER |
| DE3402800A1 (en) * | 1984-01-27 | 1985-08-01 | Hartmann & Braun Ag, 6000 Frankfurt | Photometer operating according to the gas filter correlation method |
-
1947
- 1947-01-17 FR FR1003527D patent/FR1003527A/en not_active Expired
-
1948
- 1948-10-02 DE DE1948P0003059 patent/DE828604C/en not_active Expired
-
1949
- 1949-11-21 GB GB29710/49A patent/GB678303A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1003527A (en) | 1952-03-20 |
| DE828604C (en) | 1952-01-17 |
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