A NOVEL POROUS CARBON AND ITS PERSPECTIVES FOR THE SOLID-PHASE EXTRACTION OF VOLATILE ORGANIC-COMPOUNDS

A porous carbon sorbent prepared by controlled pyrolysis of saccharose in a matrix of silica gel was tested for the preconcentration of a va riety of compounds differing in polarity and volatility (hydrocarbons, halocarbons, oxygenated compounds) in simulated and real air samples. The trapped components were desorbed off-line by liquid-(carbon disul phide and carbon disulphide with 1% methanol) and on-line by thermo-de sorption in combination with HRCGC. Adsorption-desorption properties o f the sorbent were evaluated according to the determined recovery valu es, whereby physicochemical interactions of both the sorbent and solut e were taken into consideration. With oxygenated compounds recovery da ta indicate the presence of active sites on the surface of the sorbent .