【摘要】 经过盐酸的一次反萃分离后,在30％磷酸三丁酯（TBP）-煤油体系中与大量铀共存的微克级钍的分光光度测定得到了满意的结果。钍的收率在98％以上,铀钍分离系数α_U/Tb>1×10³。方法可靠、简单、快速,并可望推广至其它中性磷类萃取剂体系。更多还原

【Abstract】 Using spectrophotometric method, microgram thorium in 30% TBP-kerosene system containing large amount of uranium was successfully determined after one-step back-extraction with hydrochloric acid. The recovery of thorium is more than 98%, and the separation factor aU/Tb is over 1 × 103. Being reliable, simple and fast, the recommended method has been used in the research on spent fuel reprocessing and is expected applicable to other neutral phosphate extraction systems such as TOPO and DMHMP.更多还原