AI Article Synopsis
- - The study investigates polychlorinated naphthalenes (PCNs) in raw cow milk from North China, focusing on how their contamination occurs and its implications for human health.
- - Higher concentrations of PCNs were found in milk from regions with more intense emission sources, with values ranging from 214 to 2050 pg/g lw, while less chlorinated congeners were most common.
- - Despite the presence of PCNs, the study concludes that the risk to humans from consuming contaminated cow milk is low, suggesting that industrial emissions might primarily affect animal feed through atmospheric deposition.
Article Abstract
The potential contamination of food items with polychlorinated naphthalenes (PCNs) has attracted increasing attention because of their toxicity, persistence and bioaccumulative characteristics. Humans are exposed to PCNs primarily through consuming animal-derived foodstuffs. However, the pathways by which PCNs can enter the food supplying chain are poorly understood. In this study, ΣPCNs were determined in raw cow milk (n = 82) collected from three different regions that varied in the intensity of PCNs emission sources in North China, using high-resolution gas chromatography/high-resolution mass spectrometry method. Higher PCN concentrations (214-2050 pg/g lw) were found in raw cow milk from dairy cow farms located in the region with relatively higher intensity of emission sources. Less chlorinated congeners were dominant in all raw cow milk samples. PCNs in cow milk might result from industrial fly ash emissions that contaminate animal feed through atmospheric deposition. Risks posed to humans through consuming PCNs in cow milk were low.
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| http://dx.doi.org/10.1016/j.foodchem.2022.132247 | DOI Listing |
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