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近年来,提出对强碱性阴离子交换树脂进行转化而制备的具有一定螯合基团的新型树脂,称为螯合形成树脂。它既保存了螯合树脂的特性,又克服了在合成上的困难。本文以8-羟基喹啉-5-磺酸(HQS)基团的螯合形成树脂,把操作程序“先吸着、后螯合”改变为“先螯合、后吸着”,即形成的HQS螯合物吸着于树脂上。这就更加简化了操作手续,又节约了螯合试剂的消耗。 (一)试剂与仪器 1.级冲溶液:用HCl-KCl、HAc-NaAc、NH_4OH-NH_4Cl分别配成pH1～8的缓冲溶液。 2.标准溶液:分别以光谱纯CuO、ZnO、CdO、MnO_2、高纯铁丝配成1毫克/毫升标准储
In recent years, a new type of resin with certain chelating groups prepared by conversion of strongly basic anion exchange resin is proposed, which is called as chelate-forming resin. It not only preserves the properties of chelating resins, but also overcomes the difficulties in synthesis. In this paper, 8-hydroxyquinoline-5-sulfonic acid (HQS) chelate resin formation, the operating procedures “pre-absorption, after chelation” changed to “chelation, after adsorption,” the formation of HQS chelate The compound is adsorbed on the resin. This further simplifies the procedure and saves the consumption of chelating reagents. (A) Reagents and Instruments 1. Level red solution: With HCl-KCl, HAc-NaAc, NH_4OH-NH_4Cl were dubbed pH1 ~ 8 buffer solution. 2. Standard solution: Spectra were pure CuO, ZnO, CdO, MnO_2, high purity wire dubbed 1 mg / ml standard storage