FT-IR Measurements of Cryo-Condensed Inert Trace Air Pollutants*

Abstract

Many of the atmospheric gaseous pollutants which may affect the environment, such as chlorofluorocarbons, occur at concentrations between 1 ppt and 1 ppb. A number of methods to identify these pollutants and to determine their abundance quantitatively have been proposed. Hanst1,2 has described a cryogenic concentration technique which can provide quantitative estimates for a number of relatively inert gases which occur at the ppb level1’2 by using infrared spectroscopy.