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胶束增溶分光光度法是60年代后期才发展起来的一类新型的分光光度分析法。该法是利用表面活性剂对金属离子——有机试剂显色反应的敏化作用以提高光度分析的灵敏度。镧(Ⅲ)系离子——生色有机试剂——表面活性剂系统的研究开展得还不够多,并且表面活性剂也只限于阳离子表面活性剂。溴邻苯三酚红(2.7—二溴-4.5.6—三羟基-9-(2′—磺基苯)—异氧杂蒽酮呫吨酮-3,BPR)与稀土离子从pH4时开始相互作用。在过量的金属离子存在下会形成等摩尔组成的络合物(λ最大=560～580nm)而当过量的BPR存在下,会形
Micellar solubilization spectrophotometry is a new type of spectrophotometry developed in the late 1960s. The method is the use of surfactants for metal ions - organic reagents sensitization reaction to improve the sensitivity of photometric analysis. Lanthanum (III) ion-chromogenic organic reagent-surfactant systems have not been developed sufficiently and the surfactants are limited to cationic surfactants. Bromopyrogallol red (2.7-dibromo-4.5.6-trihydroxy-9- (2’-sulfophenyl) -oxantrone xanthone-3, BPR) starts with rare earth ions starting at pH 4 interaction. In the presence of an excessive amount of metal ions, an equimolar complex (λ max = 560 to 580 nm) is formed, and in the presence of excess BPR,