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变色酸双偶氮衍生物为光度法中重要的一类显色剂。该类衍生物与金属离子作用时,能发生两种类型的反应,即α型和β型显色反应。后者与前者相比,通常具有灵敏度高、选择性好和对比度大等优点,故为一种极有价值的显色反应类型。表面活性剂对显色体系一般具有增溶、增敏、增择、增稳、增速和增加对比度等作用,显示了许多优异的光度性质,因而含表面活性剂的三元显色体系获得了广泛的研究和应用。同时,对表面活性剂的作用
Chromotropic acid disazo derivatives photometric method is an important class of developers. When these derivatives interact with metal ions, two types of reactions occur, that is, α-type and β-type color reactions. Compared with the former, the latter usually has the advantages of high sensitivity, good selectivity and high contrast, it is an extremely valuable color reaction type. Surfactants generally have solubilizing, sensitizing, selective, stabilizing, increasing and contrast enhancing effects on the color-developing system and show many excellent photometric properties, so ternary color-developing systems containing surfactants are obtained Extensive research and application. At the same time, the role of surfactants