用离子交换分析柱和二极管阵列检测器建立了水溶液中三价铬离子[Cr(Ⅲ)]齐聚物的分析方法,研究了检测条件、流动相、离子强度对分析的影响,优化了分析条件。以3 mol/L NaClO4(内含0.03 mol/L HClO4)为流动相,在TSK-Gel SP -5PW离子交换分析柱(75 mm×7.5 mm i.d., 10 μm)上对制备样品中的Cr(Ⅲ)齐聚物进行分离,以200 nm波长检测。该方法简便、快速,重复性好,10 min内便可完成对制备样品中3种Cr(Ⅲ)齐聚物的色谱分离。用该方法分析了各种制备条件下Cr(Ⅲ)齐聚物的含量,优化了制备条件。
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