The aim of this study was to evaluate the health risk of arsenic exposure by consumption of rice and its products marketed in northwestern Mexico. Sixty-six national and imported rice products were purchased in markets in northwestern Mexico, an endemic arsenic region. Total and inorganic arsenic in rice samples were analysed by inductively coupled plasma atomic emission spectroscopy and the risk assessment was evaluated according to the hazard quotient (HQ) and carcinogenic risk (CR). Total and inorganic arsenic in rice samples ranged from 0.06 to 0.29 mg/kg and from 0.03 to 0.13 mg/kg, respectively, and 40% of the analysed samples exceeded FAO/WHO arsenic recommended levels. The inorganic/total arsenic ratio ranged from 15% to 65%. The HQ and CR values for total and inorganic arsenic did not exceed safety levels. Therefore, rice supply in the northwestern of Mexico appears to be safe for human consumption.

中文翻译：

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墨西哥西北部大米和大米产品中的砷和健康风险评估。

这项研究的目的是通过在墨西哥西北部销售大米及其产品来评估砷暴露对健康的风险。在墨西哥西北部这个流行的砷污染地区的市场上购买了66种本国和进口大米产品。通过电感耦合等离子体原子发射光谱法分析了大米样品中的总砷和无机砷，并根据危险系数（HQ）和致癌风险（CR）评估了风险评估。大米样品中的总砷和无机砷分别为0.06至0.29 mg / kg和0.03至0.13 mg / kg，分析样品中有40％超过了FAO / WHO推荐的砷含量。无机/总砷比率为15％至65％。总砷和无机砷的HQ和CR值未超过安全水平。因此，