液膜富集铀（Ⅵ）与水中痕量铀的测定

ENRICHMENT OF URANIUM WITH LIQUID MEMBRANE AND DETERMINATION OF TRACE URANIUM IN WATER

研究了分离、富集铀（Ⅵ）的最佳液膜组成，试验了Ｓｐａｎ８０－ＴＢＰ－ＣＣｌ４－液体石蜡－ＨＣｌＯ４液膜体系富集的最优条件。用本法富集水和工业废水中的痕量铀（Ⅵ），富集可达７５倍以上。应用于测定水和废水样品中的痕量铀，相对标准偏差为２．１％，回收率为９９．００％～９９．８５％。

The emulsion liquid membrane technology has been applied to the enrichment of trace uranium in water. The optimum constituents of span80 TBP CCl 4 Liguid paraffin HClO 4 liquid membranes mixed system and the optimal conditions of enrichment were studied. An enrichment of over 75 fold was obtained for uranium The method has been successfully applied to the determination of trace uranium in industrial waste water and water samples with relative standard deviation of less than 2 1%, the recovery of uranium is between 99 00%￣99 85%.