A procedure for the determination of dichloromethaneand tetrachloroethene in water using pervaporationand gas chromatography

摘要

In the present study, pervaporation was applied to the determination of tetrachloroethene (PCE)and dichloromethane (DCM) in liquid samples. PCE is the most commonly used solvent in dry-cleaning processes. PCE belongs to group 2A of carcinogens (probably carcinogenic to humans)according to the classification of the International Agency for Research on Cancer (IARC). DCM isalso widely used as an industrial solvent for the purification and isolation of intermediates or prod-ucts. DCM is classified as a "possible" human carcinogen by the IARC. The aim of this study wasto evaluate a new procedure for the determination of DCM and PCE in liquid samples based on thepervaporative removal of DCM and PCE from liquid samples as an analyte isolation/enrichmenttechnique, followed by a direct aqueous injection of the extracts onto the column of a gas chro-matograph equipped with an electron capture detector (DAI-GC-ECD). The basic parameters ofthe new PV-DAI-GC-ECD procedure were evaluated.