• 关键词：联合测定  U  Th  ²²⁶Ra  放射化学法

• 基金项目：

• 陈进兴
• 国家海洋局第三海洋研究所,厦门

• 张平青
• 国家海洋局第三海洋研究所,厦门

• 摘要：用放射化学法对U,Th,²²⁶Ra等核素进行联合测定,国外已有不少报道,只是所用的分离方法和所测的介质不同而已。我国学者也做过一些这方面的工作。本工作建立了用三正辛胺-二甲苯萃取分离法对沉积物和生物样中U,Th和²²⁶Ra的联合测定方法。

• Abstract：A radiochemical method for simultaneous determination of U, Th and ²²⁶Ra in sediments and biomass was investigated. The sensitivities of the method were 10^-6g for U and Th and 17.7Bq/kg for ²²⁶Ra respectively. Radiochemical recovery of ²²⁶Ra was 81.7%, while chemical recovery of Ba was 90.7%. The decontamination of the method was satisfactory.

• Key words：radiochemical method  sediment  biomass  U  Th  ²²⁶Ra

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