Abstract
A continuous discharge at 230 megacycles, produced by a radio-frequency extra-hightension generator, in a sealed-off gas system, has been used in conjunction with a quartz prism spectrophotometer to study binary mixtures of argon and carbon dioxide. The concentrations of mixtures in the range 9 to 90% argon, and 91 to 10% carbon dioxide have been determined with a reproducibility of ± 3.2% absolute, expressed as a standard deviation. Determinations can be carried out in about 1 min, making the technique superior to the usual spectrographic technique. The procedure developed suggests that with improved instrumentation, ensuring constancy of source intensity, and substitution of a continuously flowing gas for the sealedoff system, it might be possible to extend the technique to mixtures of other gases and obtain better reproducibility and accuracy.
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