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本文建立了用库仑滴定剂三价铊库仑滴定铕的新方法,在3NHClO_40.1MTl~+底液中,用铂阳极电介产生 Tl~(+3)以滴定经锌汞齐还原得到的二价铕.最低可以测定几十微克的铕,平均误述和平均偏差在±1%左右.在该实验条件下铁、钒、钛均不干扰滴定,其他稀土元素不能被锌汞齐还原为可与三价铊起反应的一二价离子, 也不影响铕的测定。本法比已有的测定铕的电量法干扰小.灵敏度有所提高.而手续颇为简便.
In this paper, a new method was established for the titration of europium with Coulombic titration coulombs. In 3NHClO_40.1MTl ~ + bottom solution, platinum anodic electrolytes were used to generate Tl ~ (+3) to titrate the bivalent Europium.The lowest can measure tens of micrograms of europium, the average misstatement and the average deviation of about ± 1% .In this experimental conditions, iron, vanadium and titanium do not interfere with the titration, other rare earth elements can not be reduced by zinc amalgam to be with Trivalent thallium reaction of a divalent ions, does not affect the determination of europium. This method has less interference than the existing method for the determination of europium, the sensitivity is improved, and the procedure is quite simple.