Ein unabhängiges Verfahren zur Messung der Zusammensetzung von Gasgemischen mit Hilfe der Gaschromatographie

Summary

The volume fraction of gas mixtures may be measured gas chromatographically by application of the 100% method, provided they can be separated. In case of gases it is not necessary to calibrate with another method. The specific character of the detector signals can be eliminated by measurements with pure components. The procedure is compared with the Scholander method. In case of O₂/N₂ mixtures the results agree within reproducibility, but in case of O₂/CO₂/N₂ mixtures a systematic deviation of the CO₂ fractions to smaller values is found as concerns the Scholander method. A gas mixture with 5.6 Vol% CO₂ shows a difference of approximately 0.3 Vol%. The gas chromatographic method is almost 100 times as sensitive as the Scholander method. High fractions may be measured without problems and the method is not restricted to O₂ and CO₂.