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铕是三价稀土中唯一可被锌还原成低价的元素,因此混合希土中高含量铕的测定可采用锌汞齐把Eu~(3+)还原为Eu~(2+),再用氧化—还原法进行测定。McCoy的碘量法仅适用于大量铕的测定。Foster 等人建议的方法,虽然扩大了测定范围,但误差较大,测定过程也较长。佐藤松次等认为固态锌汞齐不能定量还原Eu~(3+),提出液态锌汞齐还原法,但因设备复杂,操作条件要求高,在实际工作中有一定限制。探索准确快速测定铕的方法,对生产
Europium is the only element of trivalent rare earth that can be reduced by zinc to a low value. Therefore, the determination of high content of europium in mixed rare earth can be achieved by reduction of Eu 3+ to Eu 2+ with zinc amalgam, - reduction method for determination. McCoy’s Iodometry is applicable only to large amounts of europium. The method proposed by Foster et al., Although the measurement range is enlarged, the error is larger and the measurement process is longer. Sato Toshinoguchi thinks that the solid zinc amalgam can not quantitatively reduce Eu 3+, and the liquid zinc amalgam reduction method is proposed. However, due to the complicated equipment and high operating conditions, there are some limitations in practical work. Explore accurate and rapid method for the determination of europium for production