Argon-nitrogen-oxygen system, liquid vapor

TABLE 2-191 Liquid-Vapor Equilibrium Data for the Argon-Nitrogen-Oxygen System... 

During the course of an experimental study of the liquid-vapor equilibria of the nitrogen-oxygen-argon system ], it was found desirable to develop a rapid and accurate method for the analysis of equilibrium samples. After consideration of a number of possible analytical methods, such as chemical reactions for nitrogen and oxygen P or mass spectrometry [ ], gas chromatography was selected as the most likely to provide an acceptable technique. 

L. Israel, C. J. Sterner, and G. M. Wilson, Argon-Oxygen-Nitrogen Three-Component System Experimental Vapor-Liquid Equilibrium Data, Quarterly Progress Report I, Contract No. AF 33(657)-8742 (Oct. 1962). 

Cryogenic liquids are materials with boiling points of less than -73 °C (-100 °F). Liquid nitrogen, helium, and argon, and slush mixtures of dry ice with isopropanol are the materials most commonly used in cold traps to condense volatile vapors from a system. In addition, oxygen, hydrogen, and helium are often used in the liquid state. 

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