Hydroxylated and methoxylated polybrominated diphenyl ethers in mollusks from Chinese coastal areas

Abstract

h i g h l i g h t sOH-PBDEs and MeO-PBDEs were determined in mollusks from Chinese coastal areas. Significant correlations were found between OH-and MeO-PBDEs. Crassostrea talienwhanensis accumulated more OH-and MeO-PBDEs. Temporal trends of OH-and MeO-PBDEs in mollusks were studied. a r t i c l e i n f o between OH-and MeO-PBDEs, but neither between PBDEs and OH-PBDEs, nor between PBDEs and MeO-PBDEs, suggesting that OH-and MeO-PBDEs may have a common source or similar accumulation behavior in mollusks. OH-and MeO-PBDEs were likely not to originate from PBDE precursors.

Metabolic pathways of decabromodiphenyl ether (BDE209) in rainbow trout (Oncorhynchus mykiss) via intraperitoneal injection

“…OH-BDEs and MeO-BDEs, which were thought to be metabolites of BDEs, have been found in wildlife (Marsh et al, 2004;Verreault et al, 2005;Sun et al, 2013;Wang et al, 2014). Overall, the results of BDE metabolism studies that have been conducted to date suggest that OH-BDEs were formed by hydroxylation of BDEs, and MeO-BDEs were then formed by methoxylation of OH-BDEs (Wiseman et al, 2011).…”

“…Several published papers have demonstrated the biotic debromination of BDE209 in fish (Roberts et al, 2011). In addition to the debrominated diphenyl ether metabolites, MeO-BDEs and hydroxylated metabolites were also detected in many species (Mörck et al, 2003;Valters et al, 2005;Sun et al, 2013, Wen et al, 2015. However, the majority of research on the occurrence of MeO-BDEs and OHBDEs in biota samples has attributed its presence to natural biogenetic formation.…”

Determination of Nine Hydroxylated Polybrominated Diphenyl Ethers and Forty Polybrominated Diphenyl Ethers in Atmospheric Fine Particles by Precolumn Derivatization-GC-MS/GC

“…Another common technique to separate different polarity components is gel-permeation chromatography. However, this method is laborious, sophisticated and consumes a large amount of organic solvent [22,23]. Regardless of separation technique, analyzing PM 2.5 samples requires complicated clean-up procedure to reduce matrix interference.…”

“…Active sampling using glass fiber filters is routinely employed for sampling PM 2.5 . The sampling duration was 8 h either during daytime from 10:00 to 18:00 or at night from 22:00 to 06:00 using a P8846X high volume mass flow controlled system for PM 10 . Before collecting PM 2.5 , the glass fiber filters were pre-baked at 500°C for 4 h and stored in the dryer at room temperature and relative humidity (40%-60%) for at least 24 h. The filters were weighed in the electronic balance (0.01 mg precision) with gravimetric methods before and after sampling, respectively.…”

“…The ecotoxicological studies found that OH-PBDEs are stronger endocrine disruptors than their precursor PBDEs. For example, OH-PBDEs will disrupt thyroid hormone action and possess pseudo/anti estrogenic activities even in a low concentration range of micromolar per liter [9][10][11]. Therefore, it is considerably important to understand the contamination level of PBDEs and OHPBDEs in PM 2.5 .…”