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用8-羟基喹啉衍生物测定钪的荧光法研究已有报道。本文研究了不同表面活性剂对钪-7-碘-8-羟基喹啉-5-磺酸(H_2QSI)反应的增敏作用,其中以溴化十六烷基三甲铵(CTMAB)增敏效果最好,与相应二元体系相比,灵敏度可提高十二倍,检出钪的最低浓度为2×10~(-8)M。同时确定了配合物最佳形成条件和配合物的组成,检查了共存离子的影响,拟定了混合稀土中微量钪的测定方法。实验部分 (一)主要试剂与仪器钪标准贮存液为3.0×10~(-2)M的2N盐酸溶液,用时按需稀释;3×10~(-4)M H_2QSI水溶液;
Fluorescence studies of scandium with 8-hydroxyquinoline derivatives have been reported. In this paper, the sensitizing effects of different surfactants on the reaction of scandium-7-iodine-8-hydroxyquinoline-5-sulfonic acid (H 2 QSI) were studied. Among them, the enhancement effect of cetyltrimethylammonium bromide Good, compared with the corresponding binary system, the sensitivity can be increased twelve times, the lowest detected scandium concentration of 2 × 10 ~ (-8) M. At the same time, the optimum formation conditions of the complex and the composition of the complex were determined, the influence of the coexisting ions was examined, and the determination method of trace scandium in the mixed rare earth was established. Experimental part (a) of the main reagents and equipment scandium standard stock solution of 3.0 × 10 ~ (-2) M 2N hydrochloric acid solution, when used on-demand dilution; 3 × 10 ~ (-4) M H2_2SI aqueous solution;