ANALYTICAL MULTIMETHOD FOR THE DETERMINATION OF LOW VOLATILE ORGANIC POLLUTANTS IN SEDIMENTS AND SEWAGE SLUDGES

By means of selected target compounds with different physical and chem ical properties an analytical method has been developed for the analys is of a wide variety of low volatile xenobiotics in sediments and sewa ge sludges. After an exhaustive extraction at different pH values firs t high molecular matrix compounds have been separated by GPC. Fraction ation of the samples into five separate groups of substances has been performed by successive column chromatography using deactivated alumin a and silica gel. For the determination of phenols a derivatization st ep with pentafluorobenzoylchloride has been incorporated into the samp le preparation. Removal of sulphur and aliphatic hydrocarbons has been accomplished by an additional clean up with TBA-sulfite reagent and s ilica gel. Recoveries of the most target compounds exceeded 80%.