各种物料中钽的光度测定法,往常用各种三苯甲烷和呫吨染料与TaF_6~-形成离子对化合物,用有机溶剂萃取测定。近年来,一些苯基萤光酮的衍生物,如4,5-二溴苯基萤光酮,水杨基萤光酮和邻硝基苯基萤光酮,在有表面活性剂存在下,(?).于水相直接测定钽,灵敏度很高。 A variety of materials tantalum photometry, the usual use of various triphenyl methane and xanthene dyes and TaF_6 ~ - ion-pair compounds, organic solvent extraction determination. In recent years, some phenylfluorone derivatives, such as 4,5-dibromophenylfluorone, salicylfluorone and o-nitrophenylfluorone, in the presence of surfactant, (? In the aqueous phase of the direct determination of tantalum, the sensitivity is high.