HIGH-RESOLUTION GAS-CHROMATOGRAPHY OF POLYCHLORINATED DIBENZO-P-DIOXINS AND DIBENZOFURANS

Glass capillary columns with different stationary phases (OV-101, OV-17 and Silar 10c) were used to study the separation of polychlorinated dibenzo-p-dioxins (PCDD) and dibenzofurans (PCDF). Thin-film, narrow bore glass capillary columns (22 m .times. 0.3-mm inside diameter) allowed lower operating temperatures (205-225.degree. C) and showed greatly increased separation efficiencies compared to conventional packed columns. Electron capture detection was used for analysis of these hazardous compounds in chlorinated phenols. Sample introduction was effected by an isothermal splitless injection technique with a high-boiling solvent. Peak identifications were made by mass spectrometric analyses. [Chlorinated phenols, used extensively in industry and agriculture, contain a variety of toxic contaminants.].