Studies on the use of commercial capillary gas chromatographic columns as diffusion denuders

The possibility of using a piece of gas chromatographic capillary column as a tubular denuder for Isolation and enrichment of organic pollutants prese nt in air was studied. The partition coefficients (K-fs) of typical organic pollutants (benzene, chlorobenzene, toluene) between the gaseous phase and the denuder sorption layer were determined and effects of analyte concentr ation in the gaseous phase and gas flow rate on partitioning were studied. The partition coefficients were found to he constant in the studied range o f concentration and gaseous mixture flow rate. A piece of a capillary colum n coated with polydimethylosiloxane can he used as a tubular denuder.