N_(263)溶剂萃取分析环境样品中微量放射性钍

Analysis of Trace Radioactive Thorium in Environmental Samples with N 263 Solvent Extraction Technique.

本文用阴离子交换剂N_(263)作为钍的萃取剂,使待测样品中的钍与铀、镭、铁、稀土等杂质元素分离,并对萃取与反萃取,干扰离子,回收率等因素进行了研究.拟定了硝酸体系萃取,盐酸反萃取,偶氮胂Ⅲ比色测定的分析方法,同时测定了土壤、植物、煤及水样中钍含量.

This paper describes a method for the analysis of trace thorium by using N263 solvent extraction technique to separate the element from other elements like uranium, radium and rare earth in the envir on mental samples. Such influencing factors as extraction, reverse extraction, interfering ion, ect. were examined.The method was used for analysing soil, water, coal, plant samples collected in Shanghai.