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. 2008 Aug 1;117(1):93–98. doi: 10.1289/ehp.11660

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GC/MS (ECNI) chromatogram of methylated HO-PBDEs in a blood sample from the United States using (A) a nonpolar column (Rxi-5; 15 m) and (B) a polar column (SP-2331; 30 m). The identified target compounds were as follows: a, 6-HO-BDE-47; b, 3-HO-BDE-47; c, 5-HO-BDE-47; d, 4′-HO-BDE-49; e, 6′-HO-BDE-99; and f, 5′-HO-BDE-99. IS, internal standard (BDE-166). The bromophenols and 4-HO-¹³C₁₂-PCB-187 are not shown.