Fiedler H, Cooper K R, Bergek S, Hjelt M, Rappe C
University of Bayreuth, Chair of Ecological Chemistry and Geochemistry, Germany.
Chemosphere. 1997 Mar-Apr;34(5-7):1411-9. doi: 10.1016/s0045-6535(97)00438-4.
In 1994, we analyzed 43 foodstuff samples from local supermarkets in southern Mississippi, USA, for PCDD/PCDF. 2,3,7,8-Cl4DD could be quantified in 31 of these samples. On a lipid basis, levels in meat (0.53-1.10 pg I-TEQ/g) and dairy products (0.42-1.10 pg I-TEQ/g) were slightly lower than those reported from other industrialized countries. While levels in dairy samples from the United States and Europe are comparable, there is a difference in the contribution of individual congeners to the I-TEQ: for example, in milk samples from Germany approximately 40% of the I-TEQ is due to the presence of 2,3, 4,7,8-Cl5DF while in the Mississippi samples this congener only contributes 16%. The highest concentrations of PCDD/PCDF in our study were detected in the farm-raised catfish (10.2-27.8 pg I-TEQ/g). A unique finding was that in addition to the 2,3,7,8-substituted PCDD/PCDF the catfish samples contained many non-2,3,7,8-substituted congeners. This is unusual because vertebrate animals selectively eliminate or metabolize the non-2,3,7,8-substituted congeners.
1994年，我们分析了美国密西西比州南部当地超市的43份食品样本中的多氯二苯并二恶英/多氯二苯并呋喃（PCDD/PCDF）。其中31份样本中可对2,3,7,8-四氯二苯并二恶英（2,3,7,8-Cl4DD）进行定量分析。以脂质计，肉类（0.53 - 1.10皮克国际毒性当量/克）和乳制品（0.42 - 1.10皮克国际毒性当量/克）中的含量略低于其他工业化国家报告的水平。虽然美国和欧洲乳制品样本中的含量相当，但各同系物对国际毒性当量的贡献存在差异：例如，在德国的牛奶样本中，约40%的国际毒性当量是由于存在2,3,4,7,8-五氯二苯并呋喃，而在密西西比州的样本中，该同系物仅贡献16%。在我们的研究中，农场养殖鲶鱼中检测到的多氯二苯并二恶英/多氯二苯并呋喃浓度最高（10.2 - 27.8皮克国际毒性当量/克）。一个独特的发现是，除了2,3,7,8-取代的多氯二苯并二恶英/多氯二苯并呋喃外，鲶鱼样本还含有许多非2,3,7,8-取代的同系物。这很不寻常，因为脊椎动物会选择性地消除或代谢非2,3,7,8-取代的同系物。
