Cui Wenbin, Liu Guangliang, Bezerra Mayara, Lagos Danielle A, Li Yanbin, Cai Yong
Department of Chemistry & Biochemistry, Florida International University , Miami, Florida 33199, United States.
Southeast Environmental Research Center, Florida International University , Miami, Florida 33199, United States.
J Agric Food Chem. 2017 Nov 8;65(44):9569-9578. doi: 10.1021/acs.jafc.7b03236. Epub 2017 Oct 25.
Recent reports of elevated levels of methylmercury (MeHg) in rice revealed the possible occurrence of MeHg in infant rice cereals, leading to potential MeHg exposure through cereal consumption. Total mercury (THg) and MeHg levels in 119 infant cereal samples commonly marketed in the United States and China and estimated daily intake of MeHg through cereal consumption were determined. Concentrations of THg and MeHg in the tested cereal samples ranged from 0.35 to 15.9 μg/kg and from 0.07 to 13.9 μg/kg with means of 2.86 and 1.61 μg/kg, respectively. Rice-based cereals contained MeHg levels significantly higher than those of nonrice cereals, indicating that MeHg in rice could be source of MeHg in cereals. Cereal consumption could be a potential pathway of MeHg exposure for infants, as the EDI through cereal consumption amounted to 4-122% of the MeHg reference dose, suggesting the necessity of further evaluation of the potential health risk of dietary MeHg exposure to infants.
近期有关大米中甲基汞（MeHg）含量升高的报道显示，婴儿米粉中可能存在甲基汞，这可能导致婴儿通过食用米粉接触甲基汞。研究测定了美国和中国市场上常见的119种婴儿米粉样品中的总汞（THg）和甲基汞含量，以及通过食用米粉估计的每日甲基汞摄入量。测试的米粉样品中总汞和甲基汞的浓度范围分别为0.35至15.9μg/kg和0.07至13.9μg/kg，平均值分别为2.86和1.61μg/kg。以大米为原料的米粉中甲基汞含量显著高于非大米类米粉，这表明大米中的甲基汞可能是米粉中甲基汞的来源。食用米粉可能是婴儿接触甲基汞的潜在途径，因为通过食用米粉的估计每日摄入量占甲基汞参考剂量的4-122%，这表明有必要进一步评估婴儿膳食中甲基汞暴露的潜在健康风险。
