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本文研究了用锌柱代替经典的锌汞齐法还原Eu~(3+)为Eu~(2+)的各种条件(如锌粒粒度的大小,还原时的酸度、流速,洗脱液及其用量等),然后用FeCl_3标准溶液直接滴定Eu~(2+)以测定铕的含量。用此法测定了钐、铕、钆富集物以及由稀土离子矿所提取的混合稀土氧化物中的铕,结果满意。
In this paper, various conditions (such as the size of zinc particle, the acidity, the flow rate, the eluent and the educts) of the reduction of Eu ~ (3 +) to Eu ~ Its dosage, etc.), and then directly titrated Eu ~ (2+) with FeCl_3 standard solution to determine the content of europium. The method was applied to the determination of europium in samarium, europium, gadolinium enrichment and mixed rare earth oxides extracted from rare earth ions. The results were satisfactory.