Determination of chloroethenes in environmental biological samples using gas chromatography coupled with solid phase micro extraction

An analytical method has been developed to determine the chloroethene series, tetrachloroethene (PCE), trichloroethene (TCE), cisdichloroethene (cis-DCE) and transdichloroethene (trans-DCE) in environmental biotreatment studies using gas chromatography coupled with a solid phase micro extraction (SPME) technique. The volatile chlorinated compounds in aqueous solution can be analyzed directly without solvent extraction, purge and trap, or thermal heating. The calibration curves have demonstrated good linear relationships within 50.0 to 3000.0 mu g L(-1) concentration range. Detection limits are 18.0, 5.0, 25.0, and 42.0 mu g L(-1), for PCE, TCE, cis-DCE and trans-DCE, respectively. Factors which affect the SPME process, such as sample adsorption time, thermal desorption time, and concentration of salt in the matrix, have also been evaluated.