福建省不同水稻品种稻米镉积累及健康风险评价

    Cadmium Accumulation and Health Risk Assessment of Different Rice Varieties in Fujian Province

    • 摘要: 为评价不同水稻品种稻米镉的积累差异及对人体的健康风险,在福建省水稻稻米镉污染风险评估基础上,收集当地常见的18个水稻品种,采用石墨炉原子吸收光谱法(GF-AAS)测定稻米中镉含量,筛选对镉具有低累积性的水稻品种,并通过概率模型评估经食用稻米摄入镉的健康风险。结果表明:供试水稻稻米镉含量为0.001~0.989 mg·kg-1,8.09%的样品镉含量超出了我国食品卫生标准值(0.2 mg·kg-1)。对不同类型水稻品种分析表明,杂交稻稻米对镉的吸收能力相对于常规稻低,三系杂交稻稻米镉含量略高于两系杂交稻;不同水稻品种稻米镉含量也存在差异,其中红优2155、T78优2155、特优716、中浙优1号和花Ⅱ优3301为镉低累积水稻品种,中浙优8号、宜香2292、宜香673、甬优9号和宜优99为镉高累积水稻品种。风险评价结果表明,不同品种稻米中镉含量的差异可以引起不同的健康风险效应。

       

      Abstract: In order to evaluate the differences of cadmium accumulation in rice grain in different Varieties with health risks to the human body, on the basis of the risk assessment of cadmium pollution in rice grain in Fujian Province, 18 common rice varieties in local area were collected and the content of cadmium in rice was determined by graphite furnace atomic absorption spectrometry (GF-AAS), and the rice variety with low cadmium content was screened and the health risk of cadmium intake from food rice was assessed through a probabilistic model. The results showed that the content of cadmium in rice grain was 0.001-0.989 mg· kg-1, and about 8.09% of the samples were exceeded the standard value of food hygiene (0.2 mg·kg-1) in China. The analysis of different type rice cultivras showed that the absorbability of cadmium in the hybrid rice was lower than that of the conventional rice. The cadmium content of three line hybrid rice was slightly higher than that of the two line hybrid rice. The cadmium content in rice varieties was also different, in which the varieties of ‘Hongyou 2155’, ‘78you 2155’, ‘Teyou 716’, ‘Zhongzhe you 1’ and ‘Hua Ⅱ you 3301’ were low-cadmium accumulative rice varieties, and the varieties of ‘Zhongzheyou 8’, ‘Yixiang 2292’, ‘Yixiang 673’, ‘Yongyou 9’ and ‘Yiyou 99’ were high cadmium-accumulative rice varieties. The results of risk assessment showed that the difference of cadmium content in different rice varieties could cause different effects of health risk.

       

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