Significant decreasing trend in human dietary exposure to PCDD/PCDFs and PCBs in Catalonia, Spain

Toxicology Letters
Juan M LlobetJosé L Domingo

Abstract

The concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/PCDFs), and 18 polychlorinated biphenyls (PCBs) were determined in samples of foodstuffs widely consumed by the population of Catalonia, Spain. The dietary intake of PCDD/PCDFs and dioxin-like (DL)-PCBs was subsequently estimated for the population of this Spanish region. These results were compared with those of a previous survey performed during 2000. For PCDD/PCDFs, the highest WHO-TEQ values corresponded to oils and fats (0.223 ng/kg), followed by fish and seafood (0.131 ng/kg) and dairy products (0.057 ng/kg), while the lowest levels were found in fruits (0.003 ng/kg), as well as in vegetables and milk (0.009 ng/kg). For DL-PCBs the highest WHO-TEQ values corresponded to the groups of fish and seafood (0.761 ng/kg) followed by oils and fats (0.169 ng/kg), and dairy products (0.039 ng/kg), while the lowest values were observed in fruits (0.004 ng/kg), and vegetables (0.005 ng/kg) and tubers (0.006 ng/kg). The current dietary intakes of PCDD/PCDFs, DL-PCBs, and PCDD/PCDFs plus DL-PCBs were estimated to be 25.7, 52.4, and 78.1 pg WHO-TEQ/day vs. 95.4, 150.1, and 245.5 pg WHO-TEQ/day found in our previous survey. It means reductions of 73%, 65%, an...Continue Reading

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