A new gas chromatograph column combining the carrier of chromosorb-B and motionless phase dibutyl phthalate, has been offered to enable a full separation of air-gas mix containing hydrocarbons with carbonyl functional group and obtaining of chromatograms with accurate peaks. Thanks to the given column, nitrogen, oxygen and products of combustion of organic substances – carbon monoxide and carbon dioxide in chromatograms are not imposed on peaks of low-molecular and low-boiling карбонильных connections carbonil compounds