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首页> 外文期刊>Environmental Science & Technology >Novel flame retardants, 1,2-bis(2,4,6-tribromophenoxy)ethane and 2,3,4,5,6-pentabromoethylbenzene, in United States' environmental samples
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Novel flame retardants, 1,2-bis(2,4,6-tribromophenoxy)ethane and 2,3,4,5,6-pentabromoethylbenzene, in United States' environmental samples

机译：美国环境样品中的新型阻燃剂1,2-双（2,4,6-三溴苯氧基）乙烷和2,3,4,5,6-五溴乙基苯

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摘要

Two brominated flame retardants, 1,2-bis(2,4,6-tribromophenoxy)ethane (TBE) and 2,3,4,5,6-pentabromoethyl-benzene (PEB), were detected and identified in ambient air samples from various sites in the United States. The identifications were confirmed by comparing the gas chromatographic retention times and mass spectra of the compounds found in the environment with those of authentic materials. Generally, the TBE concentrations in air were comparable to those of tetra- through hexabrominated diphenyl ethers (PBDEs) and often higher than those of decabromodiphenyl ether (BDE-209). The atmospheric TBE concentrations at locations in the southern United States were higher than those in the northern United States. TBE was also found in a sediment core from Lake Michigan; the concentrations of TBE increased with time, were lower than those of BDE-209, but were similar to 10 times higher than the sum of BDE-47, -99, and -100. The maximum PEB concentration in Chicago air was 550 pg/m(3),which was 10 times higher than the concentration of total PBDEs in this sample. In general, the concentrations of PEB in air samples were low but detectable and were less than those of PBDEs. PEB was not found in the sediment core from Lake Michigan. These occurrences of relatively high concentrations of TBE and PEB in environmental samples may reflect the increasing usage of these compounds as flame retardants.
机译：在来自以下环境空气样品中检测并鉴定了两种溴化阻燃剂1,2-双（2,4,6-三溴苯氧基）乙烷（TBE）和2,3,4,5,6-五溴乙基苯（PEB）美国的各种网站。通过将环境中发现的化合物的气相色谱保留时间和质谱与真实材料的气相色谱保留时间和质谱进行比较，可以确认鉴定结果。通常，空气中的TBE浓度与四溴代至六溴代二苯醚（PBDEs）相当，通常高于十溴二苯醚（BDE-209）。美国南部地区的大气TBE浓度高于美国北部地区。在密歇根湖的沉积岩芯中也发现了TBE。 TBE的浓度随时间增加，低于BDE-209，但比BDE-47，-99和-100高10倍。芝加哥空气中的最高PEB浓度为550 pg / m（3），比该样品中多溴二苯醚的总浓度高10倍。通常，空气样品中的PEB浓度较低，但可检测到，低于PBDEs。在密歇根湖的沉积物中未发现PEB。在环境样品中这些相对较高浓度的TBE和PEB的出现可能反映了这些化合物作为阻燃剂的使用日益增加。

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