GC FT-IR/MS SPECTROSCOPY OF NATIVE POLYCHLORINATED DIBENZO-P-DIOXINS AND DIBENZOFURANS EXTRACTED FROM MUNICIPAL FLY-ASH/

A number of native polychlorinated dibenzo-p-dioxins (PCDDs) and diben zofurans (PCDFs) were isolated from the ny-ash of a municipal waste in cinerator by Soxhlet extraction. Spectroscopic analysis of seven PCDDs and 10 PCDFs by GC/MS analysis coupled with FT-IR spectroscopy was pe rformed. For assignment of vibrations, some representative IR spectra were simulated by ab initio calculations at the Harbree-Fock level wit h the basis set 3-21G(d,p). The utility of GC/FT-IR/MS spectroscopy fo r congener analysis and isomer discrimination in native dioxin samples is discussed.