【摘要】 本文研究了镧的溴邻苯三酚红配离子与亚甲蓝形成沉淀的最佳条件,测定了沉淀的组成和溶度积,研究了该三元离子对体系的吸光性质,可作为沉淀、分离、高灵敏协同显色反应测定微量镧的新方法。更多还原

【Abstract】 Lanthanum ion reacts with bromopyrogallol red at oplimurn pH5.5~ 6.0 to give a blue complex which reacts with methylene blue to give an isochromatic ion-pair complex. The association capability and the absorption properties of the ion-pair system were studied Owing to the isochromatic effect of the ion-pairs, the sensitivity for the dctermination of lanthanum is enhanced .It can be used as a new method in the determination of lanthanum (Ⅲ)更多还原