TNOA萃取分离催化极谱法测定铀矿石中的铀

CATALYTIC POLAROGRAPHIC DETERMINATION OF URANIUM IN ORES AFTER SEPARATION BY TRI-N-OCTYLAMINE EXTRACTION

本法较准确,精密度好。在4N HCl介质中铀被TNOA萃取后,又用0.2NHNO_3反萃取。反萃取液不需用高氯酸蒸干。随后用铜铁试剂催化极谱法测定铀。进行了分离条件研究。分析结果与标样数值相符合。

Uranium (Ⅵ) is separated by TNOA extraction in 4N HCl. Then it is back-extracted with 0.2 N nitric acid and determined with cupferron catalytic polarographic method. There is no need to evaporate back-extract with perchloric acid. Results were in good agreement with certified values of standard reference materials. This method is more accurate and precise.