Department of Veterinary Medicine and Animal Production, University of Naples, 80137 Naples, Italy.
Istituto Zooprofilattico Sperimentale del Mezzogiorno, 80055 Portici, Italy.
J Dairy Sci. 2019 Feb;102(2):1007-1013. doi: 10.3168/jds.2018-15338. Epub 2018 Dec 26.
Chemical hazards may enter the milk chain during primary production. The study, for the first time, investigated the occurrence of bisphenol A (BPA) levels in cow milk samples collected on the farm following manual or mechanical milking and from the cooling tank. We applied a new monitoring model based on the identification of the hazards at each stage of the milk chain to identify potential pathways for contamination along the milk chain. We evaluated exposure to BPA through milk consumption based on detected contamination levels and the temporary tolerable daily intake established by the European Food Safety Authority (EFSA). Milk samples (n = 72) were analyzed using liquid chromatography with fluorescence detection. The mean BPA concentrations were 0.757 µg/L in manually milked samples, 0.580 µg/L in mechanically milked samples, and 0.797 µg/L in milk from the cooling tank. Bisphenol A occurred in the milk chain as a result of different stages of milking, and reached the highest levels at the end of the milk chain. Although the dietary intake of BPA was below the EFSA's temporary tolerable daily intake, exposure to BPA, even at low doses, through milk consumption represents a public health concern. Therefore, to ensure milk safety, new monitoring plans should be applied based on the identification of hazards at each stage of the milk chain.
化学危害物可能在初级生产过程中进入牛奶链。本研究首次调查了手工或机械挤奶后从农场采集的牛奶样本以及冷却罐中采集的牛奶样本中双酚 A(BPA)水平的发生情况。我们应用了一种新的监测模型,该模型基于在牛奶链的每个阶段识别危害物,以确定沿牛奶链污染的潜在途径。我们根据检测到的污染水平和欧洲食品安全局(EFSA)确定的临时每日耐受摄入量,评估了通过牛奶消费接触 BPA 的情况。使用液相色谱-荧光检测法分析了 72 份牛奶样本。手动挤奶样本中的 BPA 平均浓度为 0.757 µg/L,机械挤奶样本中的 BPA 平均浓度为 0.580 µg/L,冷却罐中的 BPA 平均浓度为 0.797 µg/L。BPA 出现在牛奶链中是由于挤奶的不同阶段,并且在牛奶链的末端达到最高水平。尽管通过饮食摄入的 BPA 低于 EFSA 的临时每日耐受摄入量,但通过牛奶消费接触 BPA,即使在低剂量下,也会引起公共健康关注。因此,为了确保牛奶安全,应根据在牛奶链的每个阶段识别危害物来应用新的监测计划。