Residual Condition and Risk Assessment of Heavy Metals in Potato of Inner Mongolia

内蒙古地区马铃薯中重金属残留状况与风险评价(英文)

[Objective] This study was conducted to investigate the pollution degrees of heavy metals in potato and estimate the risk to human health. [Method] The pollution distribution of 7 heavy metals total As, Hg, Cd, Pb, Cr, Ni and Cu in potato was analyzed by monitoring heavy metals in potato samples in Inner Mongolia. [Result] Residual heavy metals in potato in producing areas in Inner Mongolia satisfied national limit standards, and comprehensive heavy metal pollution index was smaller than 0.7, belonging to the safe grade. Among the 7 heavy metals, Pb and Cr pollution was relatively heavier, and contributed more to the comprehensive pollution index. The THQ values and the TTHQ value of the 7 heavy metals were all lower than 1, indicating that pollution of heavy metals in potato in Inner Mongolia caused no remarkably risk to human health. Among the 7 heavy metals, Cr content contributed the most to risk to human health, and the risk caused by Cr intake through potato was higher than that caused by other heavy metals. In different sampling regions, there were differences in risk of heavy metals in potato to human health. [Conclusion] This study provides an objective scientific basis for management of quality safety risk of potato.

[目的]对马铃薯重金属污染程度和对人体的健康风险展开风险评价。[方法]通过对内蒙古马铃薯样品的重金属监测,分析了马铃薯中的总砷、汞、镉、铅、铬、镍和铜等7种重金属的残留污染状况。[结果]内蒙古产区马铃薯重金属残留符合国家限量标准,重金属污染综合指数小于0.7,属于安全等级。铅和铬的污染相对严重,对综合污染指数的贡献相对明显。7种重金属THQ值及复合污染风险TTHQ值均小于1,表明该地区马铃薯中重金属的污染对人体健康造成的风险不明显。在以马铃薯为主粮的极大摄入水平下,铬的THQ值大于1,通过食用马铃薯摄入的铬含量可能引起人体的健康风险。不同采样区域,马铃薯中重金属对人群的健康风险存在差异性。[结论]该研究为马铃薯质量安全风险管理提供了客观科学依据。