Risk assessment of dietary exposure to PCDD/Fs, DL-PCBs and NDL-PCBs of Hong Kong resident

Concentrations of PCDD/Fs, dioxin-like PCBs as well as six indicator PCBs were determined in animal origin foods collected from Hong Kong retail market during 2008-2010. The dietary intake of an average Hong Kong adult resident was estimated to be 0.806-0.833 pg WHO-TEQ kg(-1) b.w. d(-1) of dioxin-like compounds, lower than the tolerable daily intake introduced by WHO. The 95(th) percentile consumer were exposed by dietary at the level of 2.72 to 2.81 pg WHO-TEQ kg(-1) b.w. d(-1) or 81.6-84.3 pg WHO-TEQ kg(-1) b.w. month(-1), higher than 70 pg WHO-TEQ kg(-1) b.w. month(-1). DL-PCBs contributed 49.2% of total TEQ intake. The daily intake of indicator PCB was 2.83 ng kg(-1) b.w. d(-1). Approximately 2/3 of dietary intake of dioxin-like compounds came from sea food products. Ten brands of infant formula products were tested and the potential dietary intake of formula-fed infants of Hong Kong was estimated to be 1.46-1.58 pg WHO-TEQ kg(-1) b.w. d(-1) during 1(st) month and decreases afterwards.