Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1673, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2022.463109
Keywords
Brominated flame retardants; Transformation products; Brominated phenols; Brominated dihydroxybenzenes; Brominated alkylphenols
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This study investigates the structures of tri- and tetrabrominated phenols, diphenols, methylphenols and ethylphenols by bromination of non-brominated or partly brominated (alkyl) phenols and diphenols. The resulting products were interpreted through combinatoric evaluation of GC/MS data, undirected syntheses, UV transformation studies and theoretical considerations, leading to the assignment of all 44 tri- to tetrabrominated OxyTPs existing in theory.
Knowledge on the presence of occurrence of oxygen containing transformation products (OxyTPs) of the current-use flame retardants hexabromobenzene (HBB), pentabromotoluene (PBT) and pentabromoethyl-benzene (PBEB) is limited due to the lack of standard compounds. For this purpose, we investigated the structures of tri- and tetrabrominated phenols, diphenols, methylphenols and ethylphenols. First, 13 non-brominated or partly brominated (alkyl) phenols and diphenols were brominated with the goal to generate all possible tri- and tetrabrominated isomers. Instead of compound isolation and spectroscopic analysis, the resulting products were interpreted by combinatoric evaluation of GC/MS data, data from undirected syntheses and UV transformation studies as well as theoretical considerations. Altogether, all 44 tri- to tetrabrominated OxyTPs existing in theory could be assigned and fed in a data base. (C) 2022 Published by Elsevier B.V.
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