MASS-SPECTROMETRIC ANALYSIS OF TRACE OXYGEN IN CARBON DIOXIDE (in French)
The mass spectrum of pure C0/sub 2/ contains a peak of weight 32 whose relationship to a peak at 44 varies greatly depending on the previous history of the source of ions and even during the course of an analysis. The fact that this peak is more or less proportional to the pressure and that its appearance potential is the same as that of oxygen leads us to suppose that it is prcduced from oxygen formed by dissociation of the carbon dioxide on the tungsten filament. A prior treatment of the ion source with acetylene reduces the ratio 32/44 to a value of about 15 x 10/sup -5/. This same treatment also stabilizes the spectrometer's sensitivity to oxygen. Two lines of introduction enable pure carbon dioxide, the specimen to be estimated and a reference mixture of known oxygen content, to be sent into the mass spectrometer in quick succession. Oxygen in the carbon dioxide in amounts ranging between 0 and 500 ppm can thus be determined to an accuracy of plus or minus 5 ppm, the analysis taking 30 minutes. (auth)
- Research Organization:
- Centre d-Etudes Nucleaires, Saclay, France
- NSA Number:
- NSA-15-027569
- OSTI ID:
- 4839116
- Report Number(s):
- CEA-1941
- Journal Information:
- Colloq. Spectroscopicum Intern., VIII Lucerne, Sept.(1959), Other Information: CEA-1941. Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- France
- Language:
- French
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