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A series of poly(methyl methacrylate) copolymers with terpyridine units in the side chains was obtained by free radical polymerization. The free terpyridine units were complexed by iron(II ) and zinc(II ) ions, and the complexation behavior was studied in detail, utilizing UV‐vis and viscosity titration experiments. Complexation of the polymer chains could be observed, which resulted in characteristic UV‐vis absorption bands and an increase in the solution viscosity. Addition of a strong competitive ligand (hydroxyethyl ethylenediaminetriacetic acid, HEEDTA) resulted in an efficient decomplexation.
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电镀废水中"金属-络合剂"带来的络合效应可能会降低高效液相色谱(HPLC)对络合剂分析的准确度。以镍-草酸为模式化合物,考察了络合效应对络合剂草酸HPLC分析的影响,发现质量浓度为200 mg/L的镍离子对草酸定性分析的影响较小,保留时间的变化幅度为1.0%;质量浓度为200 mg/L的镍离子对草酸定量分析的影响较大,峰面积的分析误差为33.7%。采用氢氧化物沉淀法来消除络合效应,使得峰面积的变化幅度降为1.7%,从而提高了电镀废水中草酸HPLC分析的准确度。 相似文献
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