1995—2006年我国部分地区动物样品中放射性核素水平监测

Monitoring Results of Radionuclides in Foodstuff,Vegetables and Fruits in Several Areas during 1995-2006

报道1995—2006年我国部分地区的主要肉类动物、鱼虾类、贝壳类以及牛奶放射性核素水平的监测结果。监测结果表明:①各类样品中天然放射性核素238U、232Th、226Ra、40K比活度(活度浓度)均在正常范围内。②猪肉、羊肉、鸡肉3类肉类动物样品中90Sr平均比活度分别为0.99、0.03、0.17 Bq/kg(鲜),137Cs平均比活度分别为0.54、0.02、0.03 Bq/kg(鲜);鱼类、虾类样品中90Sr平均比活度分别为0.29、0.85 Bq/kg(鲜),137Cs平均比活度分别为0.23、0.04 Bq/kg(鲜);扇贝、珍珠贝、螺蛳、牡蛎4类贝壳类样品中90Sr平均比活度为0.26 Bq/kg(鲜),137Cs平均比活度为0.04 Bq/kg(鲜);牛奶样品中90Sr平均活度浓度为0.10 Bq/L,137Cs平均活度浓度为0.02 Bq/L。

The monitoring results of radionuclides in foodstuff,vegetables and fruits in several areas during 1995-2006 are presented in this paper.The result indicated that the specific activities of ^238U,^232Th,^226Ra,^40K are all in the normal range.Average specific activity of ^90Sr is 0.99,0.03,0.17 Bq/kg（fresh） in pork,mutton and chicken and that of ^137Cs is 0.54,0.02,0.03 Bq/kg（fresh）;average specific activity of ^90Sr is 0.29 in fish and 0.85 Bq/kg（fresh） in shrimp and that of ^137Cs is 0.23 and 0.04 Bq/kg;average specific activity of ^90Sr is 0.26 Bq/kg（fresh） in scallop,pearl oyster,spiral shell and oyster and 0.04 Bq/kg（fresh） for ^137Cs;average specific activity in milk is 0.10 Bq/L for 90Sr and 0.02 Bq/L for ^137Cs,respectively.