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EVALUATION OF A SAMPLING AND ANALYSIS METHOD FOR DETERMINATION OF POLYCHLORINATED DIBENZO-P-DIOXINS AND DIBENZOFURANS IN AMBIENT AIR
Citation:
Harless, R., R. Lewis, D. McDaniel, J. Gibson, AND A. Dupuy. EVALUATION OF A SAMPLING AND ANALYSIS METHOD FOR DETERMINATION OF POLYCHLORINATED DIBENZO-P-DIOXINS AND DIBENZOFURANS IN AMBIENT AIR. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/D-91/287 (NTIS PB92129600), 1991.
Description:
General Metals Works PS-1 PUF air samplers and an analytical method based on high esolution gas chromatography - high resolution mass spectrometry (HRGC-HRMS) were valuated 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 (PBDDs/PBDFs) in ambient air. Dilute solutions of these compounds and 13c12-1,2,3,4-TCDD were used to spike tee filters of PS-1 air samplers which were then operated 24 hrs to sample 350-400 m3 ambient air. fter sampling, each quartz-fiber filter and polyurethane foam (PUF) were spiked with labeled PCDD, PCDF, PBDD, and PBDF internal standards before separate Soxhlet xtractions with benzene. he 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. esults derived from this study indicated the PS-1 ambient air samples and the analytical procedures were very efficient and that pg/m and sub-pg/m levels of total PCDDs/PCDFs, PBDDs/PBDFs, BCDDs/BCDFs, and 2,3,7,8-substituted congeners could be accurately measured. ackground levels of these compounds in the ambient air were also determined. otal PCDDs, PCDFs, TBDFs, and PeBDFs were detected in a low concentration range of 0.3 to 3.0 pg/m3.
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EVALUATION OF A SAMPLING AND ANALYSIS METHOD FOR DETERMINATION OF POLYCHLORINATED DIBENZO-P-DIOXINS AND DIBENZOFURANS IN AMBIENT AIR