Global contamination of coplanar polybrominated/chlorinated biphenyls (Co-PXBs) in the market fishes from Japan.
Global contamination of coplanar polybrominated/chlorinated biphenyls (Co-PXBs) in the market fishes from Japan.
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DOI：
10.1016/j.chemosphere.2008.01.080
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发表时间：
2008-08
期刊：
影响因子：
8.8
通讯作者：
S. Ohta;Hidekazu Tokusawa;T. Nakao;O. Aozasa;H. Miyata;M. Alaee
中科院分区：
文献类型：
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作者：
S. Ohta;Hidekazu Tokusawa;T. Nakao;O. Aozasa;H. Miyata;M. Alaee
多溴氯联苯（Polybrominated Chlorinated Biphenyls，PXBs，X=Br，Cl）是一组尚未被研究的环境污染物。在联苯主链上引入第二个卤素使可能的同系物增加到9000多种。只有数量有限的PXB可在市场上买到。为了确定这些化合物在环境基质中的存在情况，开发了一种测定生物群中五种共面多溴/氯联苯（Co-PXBs）的同位素稀释HRGC/GMS方法。4′-一溴-3，3 ′，4，5-四氯联苯和3′，4 ′，5 ′-三溴-3，4-二氯联苯的方法检出限分别为0.05 ~ 0.5pg/g。在日本市场上的18种不同鱼片中，五种共面多溴联苯和氯化联苯的浓度在4至46皮克/克湿重之间，包括小须鲸和年幼的黄尾鱼。这些数值大大低于所报告的多氯联苯混合物的数值;然而，应当指出，由于没有标准，不可能对所有异构体进行识别和定量。
Polybrominated chlorinated biphenyls (PXBs, X=Br, Cl) are a group of environmental contaminants that have not been studied previously. The introduction of the second halogen to the biphenyl backbone increases the number of possible congeners to more than 9000. Only a limited number of PXBs are commercially available. In order to determine the occurrence of these compounds in environmental matrices, an isotope dilution HRGC/HRMS method for determination of five co-planar polybrominated/chlorinated biphenyls (Co-PXBs) in biota was developed. The method detection limit for these compounds ranged between 0.05 and 0.5pg/g for 4′-monobromo-3,3′,4,5-tetrachlorobiphenyl and 3′,4′,5′-tribromo-3,4-dichlorobiphenyl, respectively. Concentrations of five co-planar polybrominated and chlorinated biphenyls in eighteen different fish fillets from Japanese markets ranged between 4 and 46pg/g wet weight for mink whale and young yellow-tail fish. These values are substantially lower than those reported for Co-PCBs; however, it should be noted that due to the unavailability of standards, identification and quantification of all the isomers was not possible.