was 8 feet long and contained nonacidwashed 30-to 60-mesh Chromosorb P (Fisher Scientific Co.) impregnated with 25% triacetin; the second was 9 feet long and contained a molecular sieve. The triacetin column was operated at 75°C. and the molecular sieve column at room temperature. These two columns separated mixtures of cyanogen, hydrogen cyanide, oxygen, nitrogen, methane, carbon monoxide, and carbon dioxide. Carbon dioxide was eluted from the first column immediately after the composite of permanent gases, so that in the presence of more than about 25% of the permanent gases carbon dioxide was not separated completely.Water vapor was adsorbed by the triacetin column so that samples saturated with moisture at room temperature were analyzed

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