辽宁省大米中甲基汞的安全性评价

目的：为了给辽宁地区大米安全食用、质量管理提供可靠依据,对辽宁地区的4个城市120批次样品中甲基汞进行液相色谱-原子荧光联用检测,根据检测数据运用风险评估软件RISK@7.5、急性膳食摄入风险评估%ARfD和慢性膳食摄入风险评估%ADI等指标对辽宁地区大米进行甲基汞膳食摄入风险评估,用大份餐LP、每日允许摄入量计算最大残留限量估计值(eMRL)。结果表明,辽宁地区甲基汞的检出数量为26,检出率为21.7%,超标样品量为2,超标率为1.67%,建立辽宁地区大米中甲基汞的风险评估模型,通过模型可以模拟出辽宁地区大米中甲基汞的平均流行率=21.4%,推断出辽宁地区一般大型商场超级市场的大米中检出甲基汞种类数量小于6种的概率小于5%,大于12种的概率小于5%,一般中、小型超级市场及早市中大米检出甲基汞种类小于1种的概率小于5%,大于7种的概率小于5%。其中至少有一种样品甲基汞检出的概率为95.6%。辽宁地区一般大型商场超市大米中甲基汞超标种类小于0种的概率小于5%大于3种的概率小于5%,一般为1-3种,辽宁地区一般中、小市场及早市中大米产品中甲基汞超标种类大于0种的概率小于5%而大于1种的概率小于5%,一般为1种。甲基汞的急性膳食摄入风险(%ARfD)为0.9382%、慢性膳食摄入风险评估%ADI甲基汞为0.11%,风险均为可接受,最大残留估计限量值为0.829mg/kg。

Safety evaluation of methylmercury in rice in Liaoning province

Objective: in order to provide reliable basis for safe eating and quality management of rice in Liaoning Province, the methyl mercury in 120 batches of samples from 4 cities in Liaoning Province was detected by hplc-afs, and the risk assessment software was used according to the test data RISK@7.5 The results showed that rice in Liaoning Province was significantly higher than that in control group (P < 0.05) The maximum residue limit (EMRL) was calculated with large meal LP and daily allowable intake. The results showed that the number of methylmercury detected in Liaoning Province was 26, the detection rate was 21.7%, the number of samples exceeding the standard was 2, and the exceeding rate was 1.67%. The risk assessment model of methyl mercury in rice in Liaoning Province was established. The average prevalence rate of methyl mercury in Rice in Liaoning Province was simulated to be 21.4%, and the types of methylmercury detected in rice in supermarkets in Liaoning Province were deduced The probability of more than 1 is less than 12%, the probability of more than 80% is less than 5%, the probability of detection of methyl mercury in rice in small and medium supermarkets and morning markets is less than 5%, and the probability of more than 35% is less than 5%. In general, the probability of exceeding the standard of methyl mercury in rice products in large supermarkets is less than 5%, and the probability of exceeding 15% is less than 5%. In general, the probability of exceeding the standard of methyl mercury in rice products in medium, small markets and morning markets is less than 5%, and the probability of more than 5% is less than 5%. The risk of acute dietary intake of methylmercury (aRfD) was 93.82%, and that of chronic dietary intake risk assessment% ADI methylmercury was 0.11%. The risk was acceptable, and the maximum residue limit was 0.829 mg / kg.