| Levels and distribution of polyborminated diphenyl ether (PBDE) congeners, including BDE28, 47, 66, 85, 99, 100, 138, 153, 154, 183，and 209 (sum of which except for BDE 209 is designated as Σ10 PBDEs), in Mandarin fish (Siniperca chuatsi) tissues were determined using the method of gas chromatography-mass spectrometry operating in the negative chemical ionization mode. The highest and lowest mean concentrations of Σ10 PBDEs were 5.71 ng·g-1 and 0.95 ng·g-1 （dry weight）, found in kidney and muscle tissue, respectively. The concentration ranges of Σ10 PBDEs in kidney, swimming bladder, liver, gills, gonad, gastrointestinal tract, skin, and muscle were 3.04～12.8, 0.81～6.90, 1.28～8.87, 0.09～6.36, 1.05～5.73, 0.022～5.06, 0.69～5.98, and 0.14～2.61 ng·g-1 （dry weight）, respectively. The tissue concentrations of Σ10 PBDEs followed the sequence of kidney， swimming bladder， liver > gills， gonad > stomach， skin， muscle. BDE47 was the predominant component among the low brominated PBDEs, accounting for 35.7% to 65.6% of Σ10 PBDEs. BDE209 was detected in 45.2% of the samples, and its levels were higher in kidney and gonad than in other organs. These results indicated that PDBEs were bioaccumulated in Mandarin fish from both feeding and gill inhalation, and they particularly preferred to concentrate in tissues with high lipid contents, such as liver, swimming bladder, and gills. |
