研究表明,除铕及镱外,用极谱法难以测定其它稀土元素。Laitinen等曾以0.1M氯化铵为支持电解质,在pH5～6下以经典极谱法测铕和镱,其半波电位分别为-0.671和-1.415伏。其后亦有人以氯化钙、氯化钾作底液,用经典极谱法测铕和镱。本文介绍以示波极 Studies have shown that, in addition to europium and ytterbium, the polarographic determination of other rare earth elements. Laitinen et al. Once used 0.1 M ammonium chloride as the supporting electrolyte, and measured the Eu (superscript 2 +) and ytterbium (III) by classical polarographic method at pH 5 ~ 6 with half-wave potentials of -0.671 and -1.415 V, respectively. Then there are people with calcium chloride, potassium chloride as the bottom liquid, measured by classical polarography europium and ytterbium. This article describes the oscilloscope pole