Abstract
Mixtures of neon, argon, krypton, nitrogen, carbon monoxide, oxygen, and methane were separated by gas-liquid chromatography at 77 K. The mobile phase was a mixture of nitrogen and helium. The stationary phase was a very thin film (10-20 {angstrom}) of liquid nitrogen adsorbed onto the surface of an inert solid support. The components were eluted in the order of their boiling points, except for CO and CH{sub 4} which adsorbed on some of the solid supports. The systems were very efficient with minimum HETP values of {approximately}500 {mu}m with support particles of 150-180 {mu}m packed in a 40-cm column. The van Deemter curves were essentially flat due to the high density and low diffusion coefficients of the mobile phase and the very low film thickness of the stationary phase. Henry's law constants for the solute gases in liquid nitrogen at 77 K were measured. The gas-liquid solubility measurements are unique because the solutes were all less volatile than the solvent.
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