Article ID Journal Published Year Pages File Type
1183099 Chinese Journal of Analytical Chemistry 2007 5 Pages PDF
Abstract

A method was evaluated for the determination of 17 kinds of 2,3,7,8-substitituted polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and 12 dioxin-like polychlorinated biphenyls (DL-PCBs) in environmental samples with isotope dilution-gas chromatography/high resolution mass spectrometry (GC/HRMS). Sample extracts were cleaned up successively with acidified silica gel batch, multilayer silica gel column and gel permeation column chromatography. Florisil column was used to separate PCBs from PCDD/Fs. Precision and recoveries of the entire procedure were evaluated by replicate analysis (n = 4) of PCDD/Fs and PCBs standard solutions, with relative standard deviation (RSD) below 8.9% and 11% for PCDD/Fs and PCBs, respectively, and with the recoveries in the range of 60%–105%. The detection limits of PCDD/Fs and dioxin-like PCBs were 0.1–0.8 pg g−1 and 0.05–0.6 pg g−1, respectively. PCDD/Fs and DL-PCBs were successfully analyzed in environmental samples such as sediment, slurry, soil and fly ash, and then their toxic equivalent was calculated.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry