Separation of permanent gases by single-column gas-liquid chromatography with liquid nitrogen as the stationary phase

Journal Article · Sat Dec 01 00:00:00 EST 1990 · Analytical Chemistry (Washington); (USA)

DOI:https://doi.org/10.1021/ac00222a018· OSTI ID:6108833

Song, Hengchang; Parcher, J F ^[1]

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1. Univ. of Mississippi, University (USA)

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.

• OSTI ID: 6108833
• Journal Information: Analytical Chemistry (Washington); (USA), Vol. 62:23; ISSN 0003-2700
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ARGON
GAS CHROMATOGRAPHY
CARBON MONOXIDE
KRYPTON
METHANE
NEON
NITROGEN
OXYGEN
ADSORPTION ISOTHERMS
EXPERIMENTAL DATA
LOW TEMPERATURE
MEASURING METHODS
MIXTURES
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHROMATOGRAPHY
DATA
DISPERSIONS
ELEMENTS
FLUIDS
GASES
HYDROCARBONS
INFORMATION
ISOTHERMS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RARE GASES
SEPARATION PROCESSES
400102* - Chemical & Spectral Procedures