Abstract
The solubilities of a number of compounds have been experimentally measured in cryogenic liquids between 77 and 135K using infrared spectroscopy in a variable pressure (up to 3 MNm−2) infrared absorption cell. Nitrous oxide, carbon dioxide and some aliphatic ethers have been found to be considerably soluble in cryogenic liquids with solubilities ranging from 10−4 to 10−8 mole fraction. The solubility data have been found to be dependent on temperature of the cryogenic liquid and the molecular structures and properties of the solute and solvent molecules The solubilities of water, hydrogen sulphide, methanol and ethanol have been found to be very low i.e. less than 10−10 mole fraction in liquid nitrogen, liquid oxygen and liquid argon. These values are considerably lower than those measured previously using gravimetric methods (10−7 to 10−5 mole fraction).
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