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Molecular structures of representatives of the groups PCDD/Fs, PBDD/Fs, dioxin-like PCB’s and mixed PXDD/Fs: (a) 2,3,7,8-tetrachloro-dibenzo-p-dioxin (b) 2,3,7,8-tetrabromo-dibenzo-p-dioxin (c) 2,3,7,8,-tetrachloro-dibenzo-furan (d) 2,3,7,8,-tetrabromo-dibenzo-furan (e) 3,3′,5,5′-pentachlorobiphenyl (PCB-126) (f) 3,3′,5,5′-pentabromobiphenyl (PBB-126) (g) 2,8-dibromo-3,7-dichlorodibenzo-p-dioxin.
