Fe(Ⅲ)—SCN~-光度法,虽然简便、快速,但其最大缺点是络合物无一定的络合比,体系稳定性差。人们对于在非离子表面活性剂存在下光度法测定铁已进行过不少研究,其中有SCN~-—Tritonx—100光度法,有SCN~-—OP体系和SCN~-—phen—op体系。这些体系的灵敏度都较老方法为高。近年来,在分析化学中所应用的表面活性剂种类增多,尤其以吐温类的强敏化作用,给人们提出了一个新的研究课 Fe (Ⅲ) -SCN ~ - photometry, although simple and fast, but its biggest drawback is that the complex complex ratio of certain, the system stability is poor. There have been many studies on the photometric determination of iron in the presence of nonionic surfactants, among which SCN ~ --Tritonx-100 spectrophotometry, SCN ~ - OP system and SCN ~ - phen-op system. The sensitivity of these systems are higher than the old method. In recent years, there has been an increase in the types of surfactants used in analytical chemistry, especially the strong sensitization of Tweens, which has given people a new research class