7796582

Levels of methoxylated polybrominated diphenyl ethers and polybrominated diphenyl ethers in hen eggs from China

Abstrac
PBDEs are widely used brominated flame retardant, which are increasingly reported in the environment.
MeO-PBDEs are structural analogs to PBDEs, and reported as natural products and novel pollutants present
in the environment. Concentrations of thirteen PBDEs and eight MeO-PBDEs in a large number of
commercial sales of hen eggs representing 15 different regions and household productions of hen eggs
representing 2 different regions collected from Hubei province of China were investigated in this study.
An effective isotopic dilution GC–MS method was firstly developed to simultaneously determine thirteen
PBDEs and eight MeO-PBDEs in hen eggs in this study. Liquid/liquid extraction, concentrated sulfuric acid
and multi-layer silica gel column chromatography cleanup were used, some important steps and crucial
parameters were modified and intensified compared with other literatures, and GC and MS conditions
were optimized. The limits of quantitation values of 0.2–۴, ۰.۸–۴ lg kg۱ wet weight in hen eggs were
calculated for PBDEs and MeO-PBDEs, respectively. In addition, good repeatability and accuracy of the
whole method were achieved. The established methods were therefore suitable for the simultaneous
determinations of thirteen PBDEs and eight MeO-PBDEs in hen eggs at trace contamination levels. Using
the established methods, PBDEs or MeO-PBDEs emerged in 4 of 40 household productions of hen eggs,
and in low-lg kg۱ wet weight for these samples

Keywords:
Methoxylated polybrominated diphenyl
ethers (MeO-PBDEs)
Polybrominated diphenyl ethers (PBDEs)
Hen eggs
Isotopic dilution GC–MS

تعداد صفحات: ۱۴

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