辽宁省大米中无机砷残留的膳食风险评估

目的 评估辽宁地区大米中无机砷残留量暴露对我省居民健康的潜在危险。方法 辽宁省随机选择在大型商场和小型农贸市场共采集样品300份, 采用液相色谱-电感耦合等离子体质谱法测定大米中亚砷酸盐As(Ⅲ), 砷酸盐As(Ⅴ)的含量。基于点评估和概率评估两种评估方式，对大米中无机砷膳食暴露进行风险评估。结果 经检测的大米中亚砷酸盐As(Ⅲ), 砷酸盐As(Ⅴ)的慢性膳食摄入风险（%ADI）值均远小于100%，急性膳食摄入风险（%ARfD）值均远小于100%。运用风险评估软件@risk7.6概率评估中，在50%，75%，90%，99%暴露量位点下，大米中亚砷酸盐As(Ⅲ), 砷酸盐As(Ⅴ)的风险商(Hazard Quotient，HQ)值均远小于1。表明辽宁地区大米中亚砷酸盐As(Ⅲ), 砷酸盐As(Ⅴ)残留量在人体可接受范围内，无明显膳食风险。结论 辽宁地区大米中无机砷含量的暴露对人体健康处于安全水平。

Dietary risk assessment of inorganic arsenic residues in rice in Liaoning Province

Objective To evaluate the potential health risk of exposure to inorganic arsenic residues in rice in Liaoning Province. Methods A total of 300 samples were randomly selected from large shopping malls and small agricultural markets in Liaoning Province, the content of arsenite and arsenate in rice was determined by high performance liquid chromatography-inductively coupled plasma mass spectrometry. Risk assessment of dietary exposure to inorganic arsenic was conducted based on point assessment and probability assessment. Results The detected chronic dietary intake risk (%ADI) values ??of arsenite and arsenate in rice in Liaoning Province were far less than 100%, and the acute dietary intake risk (%ARfD) values ??were all far less than 100%. The probability assessment results showed that the hazard quotient values ??of arsenite and arsenate in rice were far less than 1 at 50%, 75%, 90%, and 99% exposure sites. Conclusion The arsenite and arsenate residues in rice in Liaoning Province is within the acceptable range of human body, and there is no obvious dietary risk.