镧系(Pr^(3+)、Ho^(3+))-8-羟基喹啉-5-磺酸—氯化十六烷基吡啶体系的导数吸收光谱研究及分析应用

DERIVATIVE ABSORPTION SPECTRA FOR THE SYSTEM OF LANTHANUM(Ⅲ)[PRASEODYMIUM(Ⅲ),HOLMIUM(Ⅲ)]WITH 8-HYDROXYQUINOLINE-5-SULFONIC ACID AND CETYLPYRIDINIUM CHLORIDE AND THEIR APPLICATIONS

本文用导数分光光度沾测定了镧系(Pr^(3+))、Ho^(3+))与8-羟基喹啉-5-磺酸及氯化十六烷基吡啶体系的零阶及三阶导数吸收光谱,并计算了它们的摩尔吸光系数及摩尔导数吸光系数。提出了一个混合稀土中直接测定镨的方法,该方法的准确度及选择性较好。

Zero order and 3rd order derivative absorption spectra of the system of Ln(3+) (Pr^(3+),Ho^(3+)) with 8-hdroxyquinline-5-sulfonic acid and cetylpyridinium chloride have been determined by derivative spectrophotometry.The molar absorptivity of the absorption spectra and derivative spectra is calculated respectively.A method for direct determination of Pr^(+3) in rare earth mixture is proposed with good selectivity and accuracy.