3392.     THOMAS, P. R., DOWN, L., AND LEVIN, H.  Determination of Carbon Monoxide in Hydrocarbon Gases Containing Olefins.  Anal. Chem., vol. 21, No. 12, 1949, pp. 1476-1480.

        Studies of hydrocarbon synthesis and catalytic cracking make it necessary to determine CO in gases containing large amounts of olefins.  All hydrocarbons except CH₄ are removed rapidly by condensation in liquid N₂ from which the uncondensed gases -- CO, H₂, N₂, O₂ and CH₄ -- are removed to Toepler pump.  Orsat apparatus is used to remove O₂ from this mixture and to determine CO.  The major part of the CO is absorbed in acid cuprous chloride and the remainder in cuprous sulfate-2-naphthol.  CO is determined in concentrations from 0.1-100% with an average error of less than 0.5% of the CO in the samples containing 10% CO.  The accuracy is somewhat less for lower concentrations.  The total time required for the determination is less than 1 hr.

        THOMAS, R. W.  See abs. 2489.

        THOMAS, V.  See abs. 299, 300.