We found that 12.1% of Belgian export meat samples from chicken or pork, unrelated to the PCB/dioxin crisis from 1999, contained more than 50 ng polychlorinated biphenyls (PCBs)/g fat and that 6.5% of samples contain more than 20 ng/g fat for the sum of 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) and its metabolites. Part of this background contamination stems from imported animal feed ingredients (fish flour and grains), sometimes contaminated by recent use of DDT, as can be deduced from the ratio between DDT and its main metabolite, 1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene (DDE). However, after comparing PCB concentrations in fish flour and grains with those found in meat, we suggest that the high concentrations stem from recycled fat. This is the first paper describing background concentrations of PCBs in animal meat from Belgium.
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机译：我们发现，从鸡肉或猪肉中抽出的比利时出口肉样品中有12.1％与脂肪/多氯联苯（PCBs）/ g含量无关，从1999年开始就与多氯联苯/二恶英危机无关，而6.5％的样品中的多于20 ng / g g脂肪，用于1,1,1-三氯-2,2-双（对氯苯基）乙烷（DDT）及其代谢物的总和。这种背景污染的一部分来自进口的动物饲料成分（鱼粉和谷物），有时会因最近使用滴滴涕而受到污染，这可以从滴滴涕与其主要代谢产物1,1-二氯-2,2-的比率推算得出。双（对氯苯基）乙烯（DDE）。但是，将鱼粉和谷物中的PCB含量与肉中的PCB含量进行比较后，我们建议高浓度源自回收脂肪。这是第一篇描述比利时动物肉中多氯联苯背景含量的论文。
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