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.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2004年第3期184-188,共5页
Journal of Nuclear and Radiochemistry
