||Evaluation of a Sampling and Analysis Method for Determination of Polyhalogenated Dibenzo-p-Dioxins and Dibenzofurans in Ambient Air.
Harless, R. L. ;
Lewis, R. G. ;
McDaniel, D. D. ;
Gibson, J. F. ;
Dupuy., A. E. ;
||Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. ;National Aeronautics and Space Administration, Bay Saint Louis, MS. John C. Stennis Space Center.
Air pollution sampling ;
Air pollution detection ;
Gas analysis ;
Metal industry ;
Chlorine organic compounds ;
Bromine organic compounds ;
Gas chromatography ;
Mass chromatography ;
Polychlorinated dibenzodioxins ;
Polychlorinated dibenzofurans ;
Isotopic labeling ;
Polybrominated dibenzodioxins ;
Polybrominated dibenzofurans ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||General Metals Works PS-1 PUF air samplers and an analytical method based on high resolution gas chromatography - high resolution mass spectrometry (HRGC-HRMS) were evaluated for determination of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/PCDFs), polybrominated dibenzo-p-dioxins and dibenzofurans (PBDDs/PBDFs) and bromo/chloro dibenzo-p-dioxins and dibenzofurans (BCDDs/BCDFs) in ambient air. Dilute solutions of these compounds and (13)C12-1,2,3,4-TCDD were used to spike the filters of PS-1 air samplers which were then operated 24 hrs to sample 350-400 cu m ambient air. After sampling, each quartz-fiber filter and polyurethane foam (PUF) were spiked with (13)C12-labeled PCDD, PCDF, PBDD, and PBDF internal standards before separate Soxhlet extractions with benzene. The extracts were subjected to an acid/base clean-up procedure followed by clean-up on microcolumns of silica gel, alumina, and carbon and then analyzed by HRGC-HRMS. Results derived from the study indicated the PS-1 ambient air samplers and the analytical procedures were very efficient and that pg/cu m and sub-pg/cu m levels of total PCDDs/PCDFs, PBDDs/PBDFs, BCDDs/BCDFs, and 2,3,7,8-substituted congeners could be accurately measured. Background levels of these compounds in the ambient air were also determined. Total PCDDs, PCDFs, TBDFs, and PeBDFs were detected in a low concentration range of 0.3 to 3.0 pg/cu m.
||See also PB91-196063. Prepared in cooperation with National Aeronautics and Space Administration, Bay Saint Louis, MS. John C. Stennis Space Center.
||PC A02/MF A01