The use of a short cleanup followed by GC/ECD analysis for octachlorodibenzo-p-dioxin as a screening method for samples obtained from a PCDD and PCDF contaminated site.
Korfmacher-WA; Rushing-LG; Nestorick-DM; Thompson-HC Jr.; Mitchum-RK; Kominsky-JR
Chemosphere 1985; 14(6-7):847-850
The clean up and analysis of octachlorodibenzo-p-dioxin (3268879) (OCDD) from a pesticide contaminated site were studied. Dust and surface swab samples were collected from buildings that were contaminated with polychlorinated biphenyls, polychlorinated dibenzo- p-dioxins, and polychlorinated dibenzofurans. Swab samples were extracted 4 to 5 times with hexane, washed with acid and alkali, and subjected to high pressure liquid chromatography. Samples were analyzed by gas chromatography equipped with an electron capture detection system (GC/ECD). GC/ECD analysis revealed that surface swab samples contained 56 micrograms per square meter (microg/m2) OCDD, 27microg/m2 OCDD and 27microg/m2 heptachlorodibenzo-p-dioxin (HpCDD). Dust samples contained about the same amount of OCDD and HpCDD as did surface samples. Recovery of these dioxin compounds from the samples was 75 to 90 percent. The authors conclude that a total of four to five extractions resulted in a considerable cleanup of the contaminated areas.
NIOSH-Author; Detectors; Chromatographic-analysis; Agricultural-chemicals; Dust-exposure; Analytical-methods; Monitoring-systems; Chemical-properties; Sampling-methods