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磷酸盐岩用硫酸分解后的溶液中的铀,在完全氧化 Fe(Ⅱ)后,可用二-(2-乙基己基)磷酸和TBP 萃取,然后在65℃用含 Fe(Ⅱ)的8.6M 磷酸溶液反萃取。最后用偶氮胂Ⅲ测定铀。
The uranium in the solution of phosphate rocks decomposed with sulfuric acid can be extracted with di- (2-ethylhexyl) phosphoric acid and TBP after the complete oxidation of Fe (II), and then the solution of 8.6M Phosphoric acid solution back-extraction. Finally, arsenazo Ⅲ determination of uranium.