环境和生物样品中~3H和^(14)C的测量  

Measurement of ~3H and ^(14)C Radioactivity in Environmental and Biological Samples

作　　者：杨海兰[1] 

机构地区：[1]中国辐射防护研究院,山西太原030006

出　　处：《核化学与放射化学》2004年第3期184-188,共5页Journal of Nuclear and Radiochemistry

摘　　要：研究了环境和生物样品中3H和14C的测量方法。3H测量步骤包括:样品氧化燃烧,使有机结合氚(OBT)转化为氚化水,用液闪法测量3H活度。该方法的探测下限为1 2Bq/L。14C测量步骤包括:将8g左右的样品经过燃烧爆炸后转变为CO2,并最终合成苯,用液闪法测量14C的活度。该方法的探测下限(以C质量计)为1 0Bq/kg。文章同时给出了树叶、牛奶、动物、土壤等多种生物样品中3H和14C的测量结果。The determination methods for ~3 H and ^(14)C in some biological specimens are studied. After combustion, the OBT(organic bound tritium) in biological sample is converted to HTO. The tritium contents of the water is determined by liquid scintillation counting. Carbon in the sample is converted to CO_2 in an oxygen bomb. The latter is finally converted to benzene via three successive reactions CO_2→Li_2C_2→C_2H_2→C_6H_6. The limit detection is 1.2 Bq/L and 1.0 Bq/kg for tritium and radiocarbon respectively. The results of activity in environmental and biological samples are given, such as milk,leaf, soil,animal etc.

关 键 词：环境样品 生物样品 氢3 碳14 测量方法 有机结合氚 液体闪烁计数法 放射性核素 苯合成 

分 类 号：X132[环境科学与工程—环境科学] Q503[生物学—生物化学]