Abstract
The determination of chlorinated pesticides and polychlorinated biphenyls (PCBs) in environmental samples is rapidly and efficiently achieved by the simultaneous use of gas chromatography and derivatization gas chromatography. The method is based on the different stabilities of chlorinated pesticides and PCBs towards magnesium oxide in a microreactor. Extracts of samples are injected twice, first into a regular gas chromatograph and then into a gas chromatography equipped with a microreactor for derivatization. A “basic” chromatogram and a “derivatization” chromatogram are obtained and the combination of the two chromatograms provided a satisfactory solution.
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