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本文研究了用协同萃取剂泡沫塑料(聚醚型聚氨酯泡沫塑料)从天然水中萃取微量钍.实验表明,协同萃取剂(二-2-乙基己基磷酸/磷酸三丁酯/四氯化碳)按2:5:93(V/v/V)之比配制,水相酸度pH1,于30～45℃萃取20分钟为萃取微量钍的最佳条件.假设协同萃取剂不溶于水相,则分配比为4.26×10~4;相比为1:2.01×10~4.由于协同萃取剂或多或少地溶于水相,因此实际上分配比及相比均大于上述计算值. 建立了一个简单、快速、准确、经济的测定天然水中微量钍的新方法.
In this paper, the extraction of trace amounts of thorium from natural water with synergistic extractant foams (polyether urethane foam) was studied.The experiments show that synergistic extraction agent (di-2-ethylhexyl phosphate / tributyl phosphate / carbon tetrachloride) Prepared according to the ratio of 2: 5: 93 (V / V / V), the pH value of the aqueous phase is pH1, extracted at 30 ~ 45 ℃ for 20 minutes is the best condition for the extraction of trace thorium Assuming that the co-extractant is insoluble in the aqueous phase, A ratio of 4.26 × 10 4 compared to a ratio of 1: 2.01 × 10 4 As the cosurfactant is more or less soluble in the aqueous phase, the actual partition ratios and the actual distribution ratios are larger than the above calculated values. A Simple, Fast, Accurate and Economic Method for Determination of Trace Thorium in Natural Water.