Abstract
A simple method is described for the preconcentration and determination of some of the atmospheric chlorofluorocarbons by using the GC-QMS method. The halogenated hydrocarbons in 100 ml of air sample were preconcentrated into 1.7 ml of cold trap by using helium stream and were injected into a GC column. The determination of F-11 and F-12 was done by electron impact mode of the GC-QMS method. Recovery of this method is 100% and the results of replicate determinations are in good agreement with each other within the analytical error.
