Zhongguo shipin weisheng zazhi (Mar 2022)

Analysis and risk assessment of PCDD/Fs level in pork and pork liver from five areas of China

  • WU Bin,
  • ZHANG Gaoqiang,
  • JIANG Yousheng,
  • ZHOU Jian,
  • LIU Yuan,
  • LIN Xiaoshi,
  • PENG Jinling,
  • LI Yunxiu,
  • ZHANG Jianqing

DOI
https://doi.org/10.13590/j.cjfh.2022.02.022
Journal volume & issue
Vol. 34, no. 2
pp. 327 – 333

Abstract

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ObjectiveTo analyze the levels of dioxin contamination in pork and pork liver from five provinces of China： A， B， C， D， and E， and evaluate the dietary exposure of the population， aiming to provide fundamental data for the future formulation of national limit standards of PCDD/Fs.MethodsA total of 146 pork and pork liver samples were collected during 2013 to 2019. According to the national standard method "Determination of Toxicity Equivalent of Dioxins and Analogues in Foods" （GB 5009.205-2013）， 17 polychlorinated dibenzo-p-dioxin/furans （PCDD/Fs） in food samples were detected by isotope dilution chromatography/high resolution dual-focusing magnetic mass spectrometry （HRGC/HRMS）. Based on the food consumption data， the dietary exposure via pork for the population was assessed.ResultsThe median TEQ concentration of dioxin in pork and pork liver samples was 0.106 pg/g·fat and 2.32 pg/g·fat， respectively. The concentration of PCDD/Fs in pork in various regions were sequentially decreased by A （0.859 pg/g·fat）>D（0.145 pg/g·fat）>C（0.097 4 pg/g·fat）>B（0.039 9 pg/g·fat）>E（0.023 pg/g·fat）， and the decreased order of PCDD/F levels in pork liver samples from various regions was A （3.616 pg/g·fat）>B （1.84 pg/g·fat）>D（1.313 pg/g·fat）>E（0.85 pg/g·fat）. The patterns for 17 congeners of PCDD/Fs in pork and pork liver samples were similar and OCDD was the dominant congener， accounting for 95% and 90% of the total mass concentrations， respectively. As for the TEQ concentrations， the congener patterns of PCDD/Fs in pork and pork liver samples were inconsistent. In addition， it also varied greatly in the congener patterns of PCDD/Fs for the same class of food samples from different regions. The median intakes of PCDD/Fs via pork for local residents in the five regions ranged from 0.192 to 2.054 pg/kg·bw/month， which were all lower than the PTMI value recommended by JECFA （70 pg/kg·bw/m）.ConclusionPCDD/Fs contamination in pork and pork liver existed in some areas of China. Spatial difference in PCDD/F levels was observed among the five areas and higher levels of PCDD/Fs for pork existed in developed areas . Residents showed low risk of dioxin exposure via pork intake overall. It is necessary to take long-term monitoring on the levels of PCDD/Fs in retailed food covered the larger area in China， and comprehensive exposure assessments of dioxins from various food categories should be further carried out to ensure the food safety of livestock and human health in the future.

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