本文在比较研究一系列氨羧配体与稀土元素配合物极谱行为的基础上,提出了可用于分析测定的Eu(Ⅲ)-MTB配合物吸附波.在乙酸-乙酸钠-邻苯二甲酸氢钾(pH3.60)缓冲溶液中,其峰电位为-0.83伏(对s· c· E),Eu~(3+)在2.0×10~(-7)～3.0×10~(-6)M范围内,波高与其浓度呈线性关系,检测下限达5.0×10~(-8)M.初步探讨了反应机理,测得Eu(Ⅱ)-MTB配合物中Eu:MTB为1∶1. In this paper, based on the comparison of the polarographic behaviors of a series of complexes of carboxyladenyl ligands and rare earth elements, the adsorption wave of Eu (Ⅲ) -MTB complex was proposed for the analysis and determination.After acetic acid-sodium acetate-phthalate The peak potentials were -0.83 V (for s · c · E) and 2.0 × 10 -7 -3.0 × 10 -6 for Eu 3+ in the buffer solution of potassium hydrogen phosphate (pH3.60) ) M, the wave height was linear with its concentration, and the detection limit was 5.0 × 10 ~ (-8) M. The reaction mechanism was preliminarily studied, and the Eu: MTB was 1: 1 in Eu (Ⅱ) -MTB complex.