Analysis of mixed halogenated dibenzo-p-dioxins and dibenzofurans (PXDD/PXDFs) in soil by gas chromatography tandem mass spectrometry (GC-MS/MS)

► GC-MS/MS method developed for PXDD/PXDF analysis in soil. ► Method validation performed in analysis of soil from recycling plant fire site. ► Most PXDD/PXDF concentrations in soil were ∼10% that of PCDD/PCDF levels. ► Dibromo-dichlorodibenzo-p-dioxin levels 36% that of tetrachlorodibenzo-p-dioxins.