西安市蔬菜中重金属污染调查研究

Investigation and Study of Heavy Metal Pollution in Vegetables in Xi'an City

用原子吸收光谱法和原子荧光光度法测定了西安市10种蔬菜80个样品中铜、锌、汞、砷、铅、铬和镉含量。结果表明,蔬菜中铜、锌、汞、砷、铅、铬、镉含量分别为(0.982±0.680)mg/kg,(3.049±1.185)mg/kg,(0.00196±0.00248)mg/kg,(0.045±0.061)mg/kg,(0.409±0.280)mg/kg,(0.092±0.124)mg/kg,(0.00059±0.00109)mg/kg,其中分别有2.5%,75.0%,2.5%的蔬菜样品中汞、铅、铬含量超出了国家卫生标准中的允许量,10种蔬菜总体合格率为86.6%。铅仍为西安市蔬菜中的主要污染元素。进一步摸清了西安市蔬菜中7种重金属的含量分布及污染状况。

The Cu,Zn,Hg,As,Pb,Cr and Cd contents are determined by atomic flurimeter in 80 samples of 10 kinds vegetables in Xian city. The results show that Cu,Zn,Hg,As,Pb,Cr and Cd contents in vegetables are (0.982±0.680) mg/kg,(3.049±1.185) mg/kg, (0.00196±0.00248)mg/kg,(0.045±0.061)mg/kg, (0.409±0.280) mg/kg, (0.092±0.124)mg/kg and (0.00059±0.00109)mg/kg,2.5%,75.0% and 2.5%,respectively higher than the permitted level of Hg ,Pb and Cr in vegetable samples (Standard of P.R.C GB 2762-1994, GB14935-1994,GB 14961-1994). The qualified rate of 10 kinds vegetables is 86.6%.The major pollutant element is Pb in vegetables of Xian city.