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目的了解某市大米中镉污染现状,为开展食品中镉暴露风险评估提供参考依据。方法 2011年9月、2012年9月分别在所辖9个县(市、区)采集非工业园区农户自产大米414份、工业园区农户自产大米360份及流通市场大米100份,用石墨炉原子吸收法测定其镉含量,采用秩和检验和χ2检验进行统计学分析。结果非工业园区农户自产大米、工业园区农户自产大米及流通市场大米的镉含量平均值分别为0.15mg/kg、0.24mg/kg、0.19mg/kg,镉超标率分别为29.23%、41.67%、46.00%。结论该市各县(市、区)大米均有不同程度镉污染,其中工业园区大米中镉污染更严重,应进一步加强监测,控制污染,保障人群的健康。
Objective To understand the status of cadmium pollution in rice in a city and provide reference for carrying out the risk assessment of cadmium exposure in food. Methods In September 2011 and September 2012 respectively, 414 non-industrial park farmers’ self-produced rice, 414 self-produced rice in the industrial park and 100 rice in the circulation market were collected from 9 counties (cities and districts) under their jurisdiction. The content of cadmium was determined by furnace atomic absorption spectrometry. The rank sum test and χ2 test were used for statistical analysis. Results The average cadmium contents of rice produced by farmers in non-industrial parks and self-produced rice in industrial parks and rice in the circulation market were 0.15 mg / kg, 0.24 mg / kg and 0.19 mg / kg respectively, and the exceeding rates of cadmium were 29.23% and 41.67 %, 46.00%. Conclusion The rice in all counties (cities, districts) in the city have different levels of cadmium pollution. Among them, the cadmium pollution in industrial parks is more serious. Monitoring, pollution control and population health should be further strengthened.