2012~2013年西藏地区食品中总汞含量 监测结果分析

目的调查西藏地区食品中总汞含量,提出消费警示,为市场监管提供依据。方法本文采用全自动测汞仪测定食品中总汞,样品无需做离线的湿化消解或复杂前处理,可全自动直接进样。共采集拉萨市、林芝地区、山南地区、日喀则地区、阿里地区市售9大类775份食品,进行总汞检测并分析结果。结果西藏地区食品中总汞污染状况较轻,超标率仅为2.06%,主要由汞污染事件引起,其余食品均符合国家标准,汞暴露健康风险低。结论西藏食品中总汞污染总体水平不高,符合国家标准限量要求,但需加强市售外地食品的监管。

Monitoring and analysis of the contents of total mercury in food in Tibet area 2012~2013

Objective To investigate the total mercury level in food in Tibet Autonomous Region, and put forward consumption warning, and to provide a scientific basis for market supervision. Methods Total mercury in food were measured by automatic mercury analyzer. There was no need of wet digestion or complex pretreatments of sample, and automatic direct injection. A total of 775 samples of 9 categories were randomly collected from Lhasa, Nyingchi, Lhoka, Shigatse and Ngari Prefectures. The total mercury levels in these samples were detected and analyzed. Results The contamination level of total mercury in food was low, and the unqualification rate of total mercury was only 2.06%, mainly caused by mercury pollution incident, the rest of the food was accord with national standard. The potential health risk from mercury exposure was low. Conclusion The contamination levels of total mercury in common food of Tibet Autonomous Region are generally low. The total mercury level in most food is under the limit requirements of national standards. However, food safety supervision for imported food should be further strengthened.