Tetradecabromo-1,4-diphenoxybenzene (TeDB-DiPhOBz) is a brominated polyphenyl ether flame retardant (FR) that is known to photolytically degrade to produce lower brominated polybrominated-diphenoxybenzenes (PB-DiPhOBzs), which may be precursors to MeO-PB-DiPhOBzs recently reported in the Great Lakes herring gulls eggs. To our knowledge, there are no reports on TeDB-DiPhOBz or other PB-DiPhOBz by-products in any environmental sample. The present study analyzed for the presence of PB-DiPhOBzs (including TeDB-DiPhOBz) and MeO-PB-DiPhOBzs in surficial sediment from sites in Saginaw Bay in western Lake Huron (n = 7), and in comparison to southern Lake Huron (open water) (n = 5) and Lake Erie (n = 3) sediment collected in the summers of 2012 or 2013. To analyze for possible PB-DiPhOBzs (Br14–Br0), the first known analytical method was developed for extraction and cleanup of sediment samples, and analysis by HPLC–atmospheric pressure photoionization (−)-quadrupole time-of-flight-mass spectrometry. The overall recovery efficiency was optimized to on average 33–104% progressing from Br14- to Br10-PB-DiPhOBzs. Br10- to Br14-PB-DiPhOBz detection and quantification limits ranged from 0.05 to 0.15 ng g(−1) dw and 0.17 to 0.49 ng g(−1) dw, respectively. Although this is the first report, PB-DiPhOBzs (Br14–Br10) and MeO-PB-DiPhOBzs were not detectable in any sediment sample. This included a site near the mouth of the highly FR-contaminated Saginaw River, near the confined disposal facility (CDF) located in Saginaw Bay at Channel-Shelter Island, which receives dredged sediment from the Saginaw River. Our findings suggest sediments from the presently studied sites in the Great Lakes ecosystem are not a sink for TeDB-DiPhOBz and PB-DiPhOBz by-product contaminants.

中文翻译：

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劳伦大湖沉积物中十四溴-1、4-二苯氧基苯阻燃剂和分解副产物的方法和测定。

Tetradecabromo-1,4-二苯氧基苯（TeDB-DiPhOBz）是一种溴化的聚苯醚阻燃剂（FR），已知它会光解降解以生成低级的溴化多溴二苯并二苯氧基苯（PB-DiPhOBz），这可能是MeO-PB-的前体DiPhOBzs最近报道了在大湖地区鲱鸥蛋。据我们所知，在任何环境样品中都没有关于TeDB-DiPhOBz或其他PB-DiPhOBz副产品的报告。本研究分析了休伦湖西部Saginaw湾（n = 7）与南部休伦湖（开放）的表层沉积物中PB-DiPhOBzs（包括TeDB-DiPhOBz）和MeO-PB-DiPhOBzs的存在水（n = 5）和伊利湖（n = 3）2012年或2013年夏季收集的沉积物。为了分析可能的PB-DiPhOBzs（Br14–Br0），开发了第一个已知的分析方法来提取和净化沉积物样品，并通过HPLC-大气压光电离（-）-四极杆飞行时间质谱法进行分析。从Br14-到Br10-PB-DiPhOBzs，总体回收效率已优化为平均33-104％。Br10-至Br14-PB-DiPhOBz的检测和定量限分别为0.05至0.15 ng g（-1）dw和0.17至0.49 ng g（-1）dw。尽管这是第一个报告，但在任何沉积物样品中均未检测到PB-DiPhOBzs（Br14-Br10）和MeO-PB-DiPhOBzs。其中包括一个地点，该地点位于受到高FR污染的萨吉诺河河口附近，位于海峡-谢尔特岛萨吉诺湾的密闭处置设施（CDF）附近，该设施从萨吉诺河接收疏dr的沉积物。