Université de Lorraine , INRA, USC 340, UR AFPA, 2 avenue de la Forêt de Haye, TSA 40602, 54518 Vandœuvre-lès-Nancy Cedex, France.
J Agric Food Chem. 2013 Jul 24;61(29):7156-64. doi: 10.1021/jf401048j. Epub 2013 Jul 16.
This study aimed to determine the kinetics of contamination and decontamination of PCBs and PCDD/Fs in milk of lactating goats. Four goats were fed during 39 days with corn silage collected in an area accidentally contaminated and then with uncontaminated silage during 20 days. Concentrations of DL-PCBs + PCDD/Fs in milk exceeded rapidly (<15 days) the European limit value and approached steady state after 5 weeks. The decontamination kinetics in milk included first a rapid elimination phase (<10 days) followed by a slower elimination phase of 33, 51, and 59 days for DL-PCBs, NDL-PCBs, and PCDD/Fs, respectively. Therefore, in lactating goats, PCBs and PCDD/Fs contaminated forage raises concerns in terms of food safety. The study also indicates that a decontamination process of lactating animals remains feasible; 20 days was considered to be sufficient to obtain a DL-PCBs + PCDD/Fs level in milk below the regulatory value.
本研究旨在确定哺乳期山羊乳中多氯联苯（PCBs）和多氯二苯并对二恶英/呋喃（PCDD/Fs）的污染和消除动力学。4 只山羊在 39 天内食用了在意外污染地区采集的玉米青贮饲料，然后在 20 天内食用未污染的青贮饲料。乳中 DL-PCBs+PCDD/Fs 的浓度迅速（<15 天）超过了欧洲限量值，并在 5 周后达到稳定状态。乳中污染物的消除动力学包括快速消除阶段（<10 天）和较慢消除阶段，分别为 33、51 和 59 天，对应 DL-PCBs、非 DL-PCBs 和 PCDD/Fs。因此，在哺乳期山羊中，受污染饲料中的多氯联苯和多氯二苯并对二恶英/呋喃对食品安全构成了关注。该研究还表明，对哺乳期动物进行脱污染处理仍然可行；20 天被认为足以使乳中 DL-PCBs+PCDD/Fs 水平低于规定值。
