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在聚乙烯醇（PVA）存在下，铑（Ⅲ）与钼酸盐和破性染料（罗丹明B，乙基罗丹明B，耐尔蓝）形成离子缔合物，并研究四个显色体系的光度特性和40多种共存离子的影响，此方法用于冶金产品中铑的测定，结果满意．
In the presence of polyvinyl alcohol (PVA), rhodium (III) forms ionic complexes with molybdate and disintegrant dyes (rhodamine B, ethylrhodamine B, Nile blue) and four color systems Of photometric properties and more than 40 kinds of coexisting ions, this method is used for the determination of rhodium in metallurgical products with satisfactory results.