北京农贸市场4种鱼类体内重金属污染调查

为了解北京市农贸市场4种居民日常消费鱼类的重金属污染水平并初步评估其暴露风险,采用等离子体串联质谱（ICP-MS）方法对北京市农贸市场出售的鲫鱼、鲤鱼、草鱼和鲢鱼中铅、镉、铬、砷等9种重金属进行了调查.采集的96个样品中,Pb的含量为〈0.2μg·kg^-1～2.856 mg·kg^-1、Cd的含量为〈0.2μg·kg...

Investigation of Heavy Metal Contamination in Four Kinds of Fishes from the Different Farmer Markets in Beijing

To understand the contamination level and the exposure risk of heavy metals in aquatic products in Beijing, an inductively coupled plasma mass spectrometry (ICP-MS) was applied to determine nine heavy metals including Pb, Cd, Cr, As and so on in crucian carp, carp, grass carp and chub from the different farmer markets in Beijing city. All of 96 samples were collected in this study. In them, the concentration of Pb, Cd, Cr, Cu, Ni, Mn, Zn, Fe, As are < 0.2 microg x kg(-1) -2.856 mg x kg(-1), < 0.2 microg x kg(-1) 1.965 mg x kg(-1), 0.207-1.965 mg x kg(-1), 0.025-10.506 mg x kg(-1), < 0.2 microg x kg(-1) -1.971 mg x kg(-1), 0.020-3.034 mg x kg(-1), 0.630-33.260 mg x kg(-1), 9.308-26.308 mg x kg(-1), < 0.2 microg x kg(-1) -5.266 mg x kg(-1) respectively. The fishes living at the bottom of the water body were with higher heavy metal level than those living at the middle and the top of the water body. The heavy metal concentration correlation with fish species may be due to the food chain and the age of the fishes. In 96 samples, 80 percent of them meet the requirement of China national standard with 14.6%, 5.2% and 10.4% of Pb, Cd and As excess limit values. Considering different consumer's habits and the toxicology difference for different form of heavy metal, further research is needed to assess the risk of heavy metal intake for resident in Beijing.