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

doi:10.1016/j.foodchem.2022.132247

Occurrence and source analysis of polychlorinated naphthalenes in raw cow milk

Food Chem. 2022 Jul 1:381:132247. doi: 10.1016/j.foodchem.2022.132247. Epub 2022 Jan 29.

Authors

Shujun Dong¹, Jingguang Li², Baiqin Zheng¹, Lei Zhang², Su Zhang¹, Yun Zou³, Yaxin Wang¹, Mengdie Fan¹, Ruiguo Wang¹, Yi Li⁴, Yongning Wu⁵, Xiaoou Su¹, Peilong Wang⁶

Affiliations

¹ Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
² NHC Key Laboratory of Food Safety Risk Assessment, Food Safety Research Unit (2019RU014) of Chinese Academy of Medical Science, China National Center for Food Safety Risk Assessment, Beijing 100021, China.
³ Organic Biological Analytical Chemistry Group, Department of Chemistry, University of Liège, Liège 4000, Belgium.
⁴ Tangshan Food and Drug Comprehensive Testing Center, Hebei, Tangshan 063000, China.
⁵ NHC Key Laboratory of Food Safety Risk Assessment, Food Safety Research Unit (2019RU014) of Chinese Academy of Medical Science, China National Center for Food Safety Risk Assessment, Beijing 100021, China. Electronic address: [email protected].
⁶ Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China. Electronic address: [email protected].

PMID: 35114627
DOI: 10.1016/j.foodchem.2022.132247

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, 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.

Keywords: Cow milk; Dioxin-like compound; Distribution; Exposure risk; Source.

MeSH terms

Animal Feed / analysis
Animals
China
Environmental Monitoring
Gas Chromatography-Mass Spectrometry
Humans
Milk* / chemistry
Naphthalenes* / chemistry

Substances

Naphthalenes