Journal
ENVIRONMENTAL POLLUTION
Volume 156, Issue 3, Pages 1218-1226Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2008.03.020
Keywords
Bioaccessibility; PCBs; Food; In vitro method; Exposure
Categories
Funding
- Research Grants Council of the University Grants Committee of Hong Kong [HKBU 1/03C, HKBU 2482/05M]
- Hong Kong Baptist University
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Bioaccessibility of organic pollutants in food is important for exposure estimation and risk assessment. An in vitro enzyme digestion experiment was carried out to analyze the bioaccessibility of PCBs in different foods including freshwater fish (bighead carp and oriental weather fish) and vegetables (spinach and cabbage). The results indicated that the bioaccessibility of PCBs in freshwater fish (3%) was much lower than that in leafy vegetables (25%). Based on field survey, the daily exposure TEQ value from these two types of food was 17.9 pg/kg bw/day. However, when bioaccessibility was taken into consideration, the value decreased to 0.61 pg/kg bw/day. Therefore, the forms of PCBs existing in food strongly influenced the bioavailability for humans, which may have important implications on dietary exposure. To our knowledge, this is the first paper to illustrate the bioaccessibility of PCBs in different foods using an in vitro digestion method. (C) 2008 Elsevier Ltd. All rights reserved
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