Seafood pollution of heavy metals was becoming serous in Bohai Sea. To carry out human health risk
assessment, it is suggested
[28]
that both seafood consumption rate and tolerable daily intake should be counted in.
Tolerable daily intake is the maximum amount of chemicals that ordinary human body can take in one day. And
level of concern is the quotient of tolerable daily intake divided by daily seafood consumption rate
[28]
, which is the
PNEC in human health risk assessment. Risk quotient is got by dividing measured concentration in seafood to the
level of concern.