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本文以镥为例,研究了介质酸度、阴离子、显色时间、金属与试剂浓度比例和有机溶剂等对钇组稀土元素-偶氮氯膦Ⅲ螯合物的α-β转化反应的影响.测定了反应级数,并确定了生成β型螯合物的最佳条件.据此,为β型镥螯合物在分析上的应用作了初步试验.在镧共存下,测定镥的结果尚称满意.此结果为在铈组稀土元素共存下,测定钇组稀土元素提供了途径.
In this paper, the effects of medium acidity, anion, color reaction time, concentration ratio of metal to reagent and organic solvent on the α-β conversion of rare earth element-chlorophosphonazo Ⅲ chelates in yttrium group were studied. The reaction order, and to determine the best conditions for the formation of β-type chelate.Accordingly, the β-type chelates chelate for the preliminary analysis of the application of the test in the presence of lanthanum, Satisfactory. This result provides a avenue for the determination of rare earth elements in the yttrium group in the presence of rare earth elements in the cerium group.