Occurrence and source analysis of polychlorinated naphthalenes in raw cow milk.

Shujun Dong, Jingguang Li, Baiqin Zheng, Lei Zhang, Su Zhang, Yun Zou, Yaxin Wang, Mengdie Fan, Ruiguo Wang, Yi Li, Yongning Wu, Xiaoou Su, Peilong Wang

Food chemistry 2022 Jul 01

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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, Σ75PCNs 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. Copyright © 2022 Elsevier Ltd. All rights reserved.

Citation

Shujun Dong, Jingguang Li, Baiqin Zheng, Lei Zhang, Su Zhang, Yun Zou, Yaxin Wang, Mengdie Fan, Ruiguo Wang, Yi Li, Yongning Wu, Xiaoou Su, Peilong Wang. Occurrence and source analysis of polychlorinated naphthalenes in raw cow milk. Food chemistry. 2022 Jul 01;381:132247