Separation of an Amine Mixture by Gas-Liquid Solid Chromatography

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Abstract
By varying the concentration of either UCON 50-HB-2000 liquid phase or Igepal CO-880 liquid phase on Carbopack B packing deactivated with 0.8% KOH, and by varying the column length and examining isothermal and temperature program conditions, a column is selected for the separation of a mixture of aliphatic, aromatic, and cyclic amines. Several retention order reversals and an amine migration occur as the concentration of the liquid phases are varied. The majority of the same retention order reversals and the amine migration occur at different liquid phase concentrations for the two phases. The carbon surface influences the separation of the amines at concentrations of UCON liquid phase less than 10%. Rapid separation of the amine mixture was obtained by programming the temperature from 120 to 220°C at 8°C/min for a 210-cm column containing 1.5% UCON 50-HB-2000 liquid phase, 0.8% KOH on Carbopack B packing. The removal of glass wool to prevent ghosting was unnecessary.

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