| levels, distribution, and health risks of polycyclic aromatic hydrocarbons in four freshwater edible fish species from the beijing market. | we first estimated the content of polycyclic aromatic hydrocarbons (pahs) in the brain, liver, bladder, roe, and muscle of four species of edible freshwater fish from the beijing market. the distribution characteristics of pahs in these tissues and organs were analyzed to determine their health risks to humans. the results showed that the residual levels of wet weight and lipid-normalized weight ∑pahs in various tissues of these fish ranged from 0.51 ng·g(-1) to 28.78 ng·g(-1) and from 93.62 ng· ... | 2012 | 23365511 |