GB734578A - A process and apparatus for the determination of isotope ratios of stable isotopes in a gas - Google Patents
A process and apparatus for the determination of isotope ratios of stable isotopes in a gasInfo
- Publication number
- GB734578A GB734578A GB30356/51A GB3035651A GB734578A GB 734578 A GB734578 A GB 734578A GB 30356/51 A GB30356/51 A GB 30356/51A GB 3035651 A GB3035651 A GB 3035651A GB 734578 A GB734578 A GB 734578A
- Authority
- GB
- United Kingdom
- Prior art keywords
- receiver
- chambers
- chamber
- gas
- 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
Links
- 238000010521 absorption reaction Methods 0.000 abstract 3
- 239000012528 membrane Substances 0.000 abstract 3
- 239000008246 gaseous mixture Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000005855 radiation Effects 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
Abstract
734,578. Radiation gas analysers. STICHTING VOOR FUNDAMENTEEL ONDERZOEK DER MATERIE. Dec. 28, 1951 [Dec. 29, 1950], No. 30356/51. Class 40 (3): An infra-red gas analyser suitable for determination of the isotope ratio of stable isotopes in a gaseous mixture of the type having two branches each containing an infra-red radiator, a screen for periodically interrupting the infrared light, an absorption chamber and a receiver chamber, is provided with an amplifier and a measuring device selectively sensitive for frequency and phase for the measurement of signal derived either from a membrane condenser separating the two receiver chambers, or from microphones coupled in opposition placed one in each receiver chamber. The receiver chambers have a length of 2 to 6 mm. As shown in Fig. 1 light from infra-red radiators 1, 2 passes through apertures in a synchronously-driven disc 3 and an adjustable diaphragm 12 (to adjust the initial signal to zero), through absorption chambers 4 and 5 and receiver chambers 6 and 7, the latter pair being separated by a membrane condenser 8 and 9. The condenser plates are connected via an amplifier 10 to a phaseindicating device and a frequenoy-sensitive A.C. galvanometer 11 or a phase and frequency sensitive meter as described in " Physica," Volume XI, No. 6. For the determination of <SP>13</SP>CO 2 in the presence of <SP>12</SP>CO 2 , the .receiver chamber is filled with 52.5 per cent of <SP>13</SP>CO 2 and 47.5 per cent of <SP>12</SP>CO 2 at a pressure of 150 to 600 mm. Hg, the receiver chamber length preferably being 3 mm. The absorption chambers may be 50 to 100 mm. long and filled at a pressure of 100 to 250 mm., one with the gas to be analysed and the other with a mixture of known concentration. Instead of having two parallel arms as shown in Fig. 1, with the receiver chambers separated by a membrane condenser, the arms may be on opposite sides of the radiator and the receiver chambers provided with microphones, which are coupled in opposition.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL734578X | 1950-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB734578A true GB734578A (en) | 1955-08-03 |
Family
ID=19820379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30356/51A Expired GB734578A (en) | 1950-12-29 | 1951-12-28 | A process and apparatus for the determination of isotope ratios of stable isotopes in a gas |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1049016A (en) |
| GB (1) | GB734578A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0584897A1 (en) * | 1992-07-22 | 1994-03-02 | MANNESMANN Aktiengesellschaft | Non-dispersive infrared spectrometer |
| EP0634644A1 (en) * | 1993-07-13 | 1995-01-18 | Mic Medical Instrument Corporation | Device for determining the 13CO2/12CO2 concentration ratio in a gas sample |
-
1951
- 1951-12-28 GB GB30356/51A patent/GB734578A/en not_active Expired
- 1951-12-29 FR FR1049016D patent/FR1049016A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0584897A1 (en) * | 1992-07-22 | 1994-03-02 | MANNESMANN Aktiengesellschaft | Non-dispersive infrared spectrometer |
| EP0634644A1 (en) * | 1993-07-13 | 1995-01-18 | Mic Medical Instrument Corporation | Device for determining the 13CO2/12CO2 concentration ratio in a gas sample |
| US5479019A (en) * | 1993-07-13 | 1995-12-26 | Mic Medical Instrument Corporation | Apparatus for determining the 13 CO2 /12 CO2 ratio of concentrations in a gas sample |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1049016A (en) | 1953-12-28 |
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