THE GAS CHROMATOGRAPHIC ANALYSIS OF CARBON DIOXIDE BASED GAS MIXTURES USING MOLECULAR SIEVE 13X AND TEMPERATURE PROGRAMMING

摘要

This paper describes an analytical technique for the determination of permanent gases (i.e. hydrogen, oxygen, nitrogen, methane and carbon monoxide) in carbon dioxide. At a chromatographic column temperature of 100°C, the reten¬tion volume of carbon dioxide on molecular sieve is large compared with the retention volumes of the permanent gases. However, for a high sampling frequency or for automation of the analysis the carbon dioxide may be removed rapidly from the column, after elution of the permanent gases, by raising the column tempera¬ture to 300°C for 20 minutes, followed by forced cooling to the original operating temperature.