Objective To study polychlorinated biphenyls(PCBs) pollution level in seafood and tidal-flat environment of the south of Hangzhou Bay.Methods Seven kinds of seafood and tidal-flat sediments were collected from six tidal-flat farms in south of Hangzhou Bay from 2010 to 2011.The contents of PCBs were determined with gas chromatography-tandem mass spectrometry(GC-MS/MSO) and the correlation between PCBs and seafood and tidal-flat pollution was analyzed.Results Concentration ranges of PCBs in 880 samples of 7 k...