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参照重金属检测国家标准,采用原子吸收光谱法分别对4种茄果类蔬菜120个蔬菜样品Pb,Cd,Cu和Zn的重金属元素的含量进行了测定,并利用单因素法和内梅罗指数法评价蔬菜重金属污染情况,健康风险评价模型对当地居民摄食蔬菜导致的健康风险进行了评价和分析。结果表明,4种检测样品中均有重金属Pb含量超标,Cd只在茄子中超标,综合污染指数都小于1,处于警戒级。通过蔬菜途径导致的Pb,Cd,Cu和Zn的THQ值分别为1.59×10-7,2.85×10-5,7.49×10-7和9.29×10-9 mg/(kg·d),联合THQ值为2.89×10-5,低于美国环保局与国际放射防护委员会分别推荐的标准,即当地居民经茄果类蔬菜途径摄入重金属引起的人体健康风险较低。
According to the national standard of heavy metal detection, the content of heavy metal elements in Pb, Cd, Cu and Zn of 120 vegetable samples from 4 kinds of solanaceous vegetables were determined by atomic absorption spectrometry. The single factor method and Nemerow index The assessment of heavy metal pollution in vegetables, health risk assessment model of local residents eating vegetables caused by health risks were evaluated and analyzed. The results showed that the content of heavy metal Pb in the four kinds of test samples exceeded the standard, Cd exceeded only in eggplant, and the comprehensive pollution index was less than 1, which was at the alert level. The THQ values of Pb, Cd, Cu and Zn caused by vegetables were 1.59 × 10-7, 2.85 × 10-5, 7.49 × 10-7 and 9.29 × 10-9 mg / (kg · d), respectively. Combined with THQ A value of 2.89 × 10-5, which is lower than the recommended standards respectively by the US Environmental Protection Agency and the International Commission on Radiological Protection. That is, the local residents are at low risk to human health caused by heavy metal intake via solanaceous vegetables.