Analysis of dust and surface swab samples for octachlorodibenzo-p- dioxin and heptachlorodibenzo-p-dioxins by fused silica capillary GC with EC detection.
Korfmacher-WA; Rushing-LG; Nestorick-DM; Thompson-HC Jr.; Mitchum-RK; Kominsky-JR
HRC & CC, J High Resolut Chromatogr Chromatogr Commun 1985 Jan; 8(1):12-19
A fused silica capillary gas chromatographic method for the analysis of octachlorodibenzo-p-dioxin (3268879) (OCDD) and heptachlorodibenzo-p-dioxin (35822469) (HpCDD) in dust and surface swab samples was tested. Swab samples were collected from a contaminated surface area and samples were extracted with hexane. The extracted samples were analyzed by gas chromatography equipped with electron capture detection system (GC/ECD). Dust samples were collected from horizontal surfaces made into a composite sample containing 30 to 40 grams of dust. Dust samples were extracted with benzene (71432). The sample extracts were subjected to a chemical purification procedure and subjected to high pressure liquid chromatography (HPLC). The purified samples were analyzed by GC/ECD. Samples were well separated by GC and ECD provided identification of OCDD and HpCDD. HPLC cleanup was capable of separating most of the polychlorinated biphenyls and other compounds from the HpCDD and OCDD. Recovery was in the range of 61 to 90 percent. The detection limit of the GC/ECD procedure was 0.5 picogram of OCDD. The detection limit was dependent on the sample matrix. The authors conclude that the GC/ECD procedure is reasonably accurate for analysis of swab and dust samples for the content of polychlorinated biphenyls.
Sampling-methods; Materials-testing; Dust-exposure; Chromatographic-analysis; Detectors; Equipment-design; Qualitative-analysis; Air-sampling; Laboratory-techniques; Analytical-methods
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Journal of High Resolution Chromatography & Chromatography Communications: HRC & CC