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早先的研究已经表明湿法磷酸和磷矿中铀用三辛基膦化氧(TOPO)萃取后,用氩等离子发射光谱法(APES)测定的可行性。此新方法原理虽然相同,但也包括了各种改进措施:(1)环已酮中的TOPO萃取铀使用了不同的基质酸;(2)用抗坏血酸作还原剂,以消除萃取和后萃取阶段有干扰的铁离子;(3)为定量地从环已酮中的TOPO反萃或“解释”铀使用了新的增效系统,因此取消了TOPO的酸分解步骤;(4)用APES测定解吸溶液中的铀。
Earlier studies have shown the feasibility of using argon plasma-atomic emission spectrometry (APES) after the extraction of uranium with trioctylphosphine oxide (TOPO) in wet-process phosphoric acid and phosphate rock. Although the principle of the new method is the same, various improvements are also included: (1) TOPO extracted from cyclohexanone uses different hyaluronic acid for uranium extraction; and (2) ascorbic acid is used as a reducing agent to eliminate extraction and post-extraction (3) a new synergistic system was used to quantitatively extract or “interpret” uranium from TOPO in cyclohexanone, thus eliminating the acid decomposition step of TOPO; (4) using the APES assay Desorb the uranium in solution.