Department of Chemistry, Umeå University, 901 87 Umeå, Sweden.
Chemosphere. 2010 Feb;78(6):724-30. doi: 10.1016/j.chemosphere.2009.11.023. Epub 2009 Dec 11.
Ten previously unidentified polybrominated dibenzo-p-dioxins (PBDDs) were identified or tentatively identified in samples of Baltic Sea sediment and biota. Five tetrabrominated dibenzo-p-dioxins (TeBDDs) were identified using authentic reference standards, including the four most abundant (previously denoted 4U1 through 4U3). In addition, five tribromodibenzo-p-dioxins (TrBDDs) were tentatively identified using retention times and analysis of TeBDD debromination products (including a moderately abundant compound previously denoted 3U1). An attempt was made to improve the gas chromatographic separation of the major TeBDDs, but with limited success. The data generated were used as basis for a discussion on the potential PBDD formation routes. No single formation pathway could explain the PBDD patterns found. Instead, a combination of a number of potential formation processes is suggested, including enzymatic and photolytic coupling of environmentally abundant bromophenols or hydroxyl diphenyl ethers (OH-PBDEs), and debromination of PBDDs to lesser brominated products.
在波罗的海沉积物和生物样本中鉴定或初步鉴定出了 10 种先前未识别的多溴二苯并对二恶英（PBDD）。使用真实的参考标准鉴定出了 5 种四溴二苯并对二恶英（TeBDD），包括最丰富的 4 种（以前表示为 4U1 到 4U3）。此外，使用保留时间和 TeBDD 脱溴产物分析（包括以前表示为 3U1 的一种中等丰富的化合物）初步鉴定了 5 种三溴二苯并对二恶英（TrBDD）。尝试改进主要 TeBDD 的气相色谱分离，但收效有限。生成的数据被用作讨论潜在 PBDD 形成途径的基础。没有单一的形成途径可以解释所发现的 PBDD 模式。相反，建议结合多种潜在的形成过程，包括环境中丰富的溴酚或羟基二苯醚（OH-PBDE）的酶促和光解偶联，以及 PBDD 脱溴生成较少溴化产物。
