Department of Physiology, College of Medicine, China Medical University, 91 Shueh-Shih Road, Taichung 404, Taiwan.
J Agric Food Chem. 2012 Feb 29;60(8):1963-72. doi: 10.1021/jf204468s. Epub 2012 Feb 15.
The consumption of free-range eggs is becoming more popular worldwide. We analyzed the levels of 12 dioxin-like polychlorinated biphenyls (dl-PCBs) and their congener profiles from 6 free-range and 12 caged egg samples. The mean levels of dl-PCBs in the free-range samples were 5.4 times higher than those in caged eggs. All egg samples exhibited at least two characteristic dl-PCB congener patterns, which reflected distinctive contamination sources. Additionally, for the first time, we demonstrated that the dl-PCB levels in the free-range eggs were highly correlated with elevated levels of 17 polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) (r = 0.986; p < 0.001), indicating a coexposure scenario in free-range hens. Cluster analysis of congener patterns implied that this coexposure scenario could be attributed to distinct dl-PCB and PCDD/F sources. This congener profile information provides insights from a different perspective for further identifying potential dl-PCB and PCDD/F sources in the polluted free-range eggs.
散养鸡蛋的消费在全球范围内越来越受欢迎。我们分析了 6 个散养鸡蛋和 12 个笼养鸡蛋样本中 12 种二恶英类多氯联苯（dl-PCBs）及其同系物的水平。散养样本中的 dl-PCBs 平均水平比笼养鸡蛋高 5.4 倍。所有鸡蛋样本均表现出至少两种特征性 dl-PCB 同系物模式，反映了不同的污染来源。此外，我们首次证明，散养鸡蛋中的 dl-PCB 水平与高水平的 17 种多氯二苯并对二恶英和多氯二苯并呋喃（PCDD/Fs）（r = 0.986；p < 0.001）高度相关，表明散养母鸡存在共同暴露情况。同系物模式的聚类分析表明，这种共同暴露情况可能归因于不同的 dl-PCB 和 PCDD/F 来源。这种同系物谱信息从不同角度提供了进一步识别受污染散养鸡蛋中潜在 dl-PCB 和 PCDD/F 来源的见解。
