美国阿肯色州鲶鱼饲料中的多氯二苯并二恶英和多氯二苯并呋喃污染
PCDD and PCDF contamination in catfish feed from Arkansas, USA.
作者信息
Rappe C, Bergek S, Fiedler H, Cooper K R
机构信息
Institute of Environmental Chemistry, Umeå University, Sweden.
出版信息
Chemosphere. 1998 Jun;36(13):2705-20. doi: 10.1016/s0045-6535(98)00040-x.
One combined catfish feed sample from Arkansas, USA, and its eight ingredients were analyzed for PCDDs and PCDFs. One of the ingredients, soybean meal, was highly contaminated by PCDDs, especially the toxic 2,3,7,8-substituted congeners, e.g., 7.3 pg/g dry weight or 370 pg/g lipid for the 2,3,7,8-tetra CDD. The I-TEQ value for the soybean meal was 11.4 pg/g dry weight or 576 pg/g fat. The corresponding values for the combined catfish feed concentrations were approximately 3 times lower. The congener pattern, the congener profile and the ratio sigma PCDDs/sigma PCDFs for the soybean meal were quite unique. We are not aware of any environmental sample or technical product with similar characteristics. As a result, natural formation of the PCDDs found in the soybean meal cannot be ruled out.
对来自美国阿肯色州的一份鲶鱼混合饲料样本及其八种成分进行了多氯二苯并二恶英（PCDDs）和多氯二苯并呋喃（PCDFs）分析。其中一种成分豆粕被PCDDs高度污染，尤其是有毒的2,3,7,8-取代同系物，例如，2,3,7,8-四氯二苯并二恶英的含量为7.3皮克/克干重或370皮克/克脂质。豆粕的国际毒性当量（I-TEQ）值为11.4皮克/克干重或576皮克/克脂肪。鲶鱼混合饲料中相应的浓度值大约低3倍。豆粕的同系物模式、同系物分布以及PCDDs总和与PCDFs总和的比率相当独特。我们不知道有任何具有类似特征的环境样本或工业产品。因此，不能排除豆粕中发现的PCDDs是自然形成的。
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