浙江省7个地区冬笋中铅、镉、铬、砷、汞的 含量及风险评价

目的评价浙江省7个地区冬笋中Pb、Cd、Cr、As、Hg 5种重金属的污染程度。方法采用石墨炉原子吸收光谱法和原子荧光光谱法测定84个冬笋样品中Pb、Cd、Cr、As、Hg 5种重金属的含量,并与国家标准中的限量值进行比较,通过计算单因子污染指数和尼梅罗综合污染指数评价冬笋的污染状况。结果所测定的84个冬笋样品中,Pb、Cd、Cr、As、Hg的单因子污染指数平均值分别为0.96、0.59、0.10、0.01、0.03;尼梅罗综合污染指数评价分析的结果表明,67份样品处于未污染状态,占总样本的79.8%;8份样品处于警戒范围内,占总样本的9.5%;8份样品处于轻污染状态,占总样本的9.5%;1份样品受到中度污染,占总样本的0.2%。结论浙江省所采样地区的冬笋样品中的重金属污染风险主要来自Pb,其次是Cd,Cr、As和Hg的污染风险最低。

Content of Pb, Cd, Cr, As, Hg and risk assessment in winter bamboo shoots in 7 areas of Zhejiang province

ObjectiveTo analyze the contents of Pb, Cd, Cr, As and Hg in winter bamboo shoots in Zhejing Province, and to evaluate the pollution of heavy metal.Methods The graphite furnace atomic absorption spectrometry and atomic fluorescence spectrometry were adopted to detect contents of Pb, Cd, Cr, As and Hg in bamboo shoots, and the data were compared with the food contaminants in standard. The single factor pollution index and the Nemerow comprehensive pollution index were used to evaluate contamination in winter bamboo shoots. Results The single factor pollution index of Pb, Cd, Cr, As and Hg in 84 winter bamboo shoots were 0.96, 0.59, 0.10, 0.01 and 0.03, respectively. Nemerow comprehensive pollution index showed that 67 samples were safe and clean, 8 samples were in the warning area,8 sampleshadSreachedSlow-gradepollutionSlevel, Only 1 sample was pollutedSSinmiddle degree. FourSpollution degrees mentionedSabove tookSup 79.8%,9.5%,9.5% and 0.2% of the total sample,respectively. Conclusion Pollutionrisk ofheavy metalin bamboo shoots in Zhejiang was mainly caused by Pb, SecondSpollutionSis Cd, and Cr, As, Hg caused the lowest risk.