Dietary exposure to PCBs by seafood cooking method: A Korean study.

The levels of 82 polychlorinated biphenyl (PCB) congeners in 86 different types of seafood (n = 237) were analyzed and the PCBs changes in seafood by seven cooking methods were verified from 51 different species of seafood (total 127 pairs) to confirm the effect of cooking on dietary PCB levels in the human body. Total PCB levels in raw seafood ranged from 0.01 to 20.6 ng/g ww, while those for DL PCBs ranged from 0.001 to 1.67 pg TEQ/g ww. There was no statistically significant difference between PCB levels in raw and each different cooked seafood. However, Raw seafood samples with PCB concentrations under 1 ng/g showed a markedly increase in PCBs after cooking. When comparing mean and median value for total PCBs, the high-fat fish group exhibited a slightly decreasing PCB concentrations trend after cooking. The estimated daily intake (EDI) of cooked seafood was 1.07 ng/kg BW/day, while the EDI for raw seafood was 1.26 ng/kg BW/day.