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本文报道在聚乙烯醇存在下，钇与钼酸铵和丁基罗丹明Ｂ形成离子缔合物．该缔合物的λｍａｘ为５８０ｎｍ，表观摩尔吸光系数ε为４．７４×１０５Ｌｍｏｌ－１ｃｍ－１，钇量在０～３．０μｇ／２５ｍＬ范围服从比耳定律．缔合物吸光度可稳定７２ｈ以上．缔合物中Ｙ与ＢＲＢ的摩尔比为ＹＢＲＢ＝１２．考察了４０多种共存离于的影响，大多数常见元素不干扰钇的测定．本法用于某些矿样中钇的测定，获得满意的结果．
This paper reports the formation of ion-association of yttrium with ammonium molybdate and butyl rhodamine B in the presence of polyvinyl alcohol. The λ max of the association product is 580 nm, the apparent molar absorptivity ε is 4.74 × 10 5 mol -1 cm -1, and the yttrium content is in the range of 0 to 3.0 μg / 25 mL. Associate absorbance can be stable 72h or more. The molar ratio of Y to BRB in the complex is YBRB = 12. Examined the impact of more than 40 kinds of coexistence, the majority of common elements do not interfere with the determination of yttrium. This method is used for the determination of yttrium in some mineral samples and obtains satisfactory results.