A simple gas chromatographic method has been developed for the analysis of gaseous impurities in the range of 2-100 ppm in butadiene.A high sensitive catharometer with tungsten filament was used as a detector; molecular sieves 5Å,as adsorbent for the separation of H₂,N₂,O₂,CH₄ and CO; and ethyl acetoacetate,as stationary liquid for the separation of CO₂ and of C₁-C₄ gaseous hydrocarbons.The influence of the operation parameters on the minimum detectability has been discussed.Based on these considerations a method of analysis was proposed.The minimum detectable amount of hydrogen,oxygen,nitrogen,carbon monoxide,methane,carbon dioxide,and other gaseous hydrocarbons of the method is 0.02,0.1,0.3,0.4,0.4,0.3,0.2-0.9,μ1 respectively.The volume of sample for the analysis of hydrogen is 10 ml,for O₂,N₂,CO and CH₄,50 ml,and for CO₂ and gaseous hydrocarbons,13 ml.The minimum detectable concentrations under these conditions are 2,2,6,8,8,20 and 14-74 ppm for H₂,O₂,N₂,CO,CH₄,CO₂ and gaseous hydrocarbons respectively.