Polychlorinated Dibenzo-p-dioxins (PCDD) and Dibenzofurans (PCDF) in f
ly ash samples from coal-burning power plants in Greece have been dete
rmined by high resolution gas chromatography combined with mass spectr
ometric detection (HRGC-MS) applying the isotopic dilution technique.
Concentrations of PCDFs were 20 to 600 fold higher than for PCDDs. The
concentrations of PCDDs and PCDFs were in the range of 11-62 and 1254
-7180 pg/g respectively. Fly ashes from coal-burning power plants were
found to be potential sources of PCDFs.