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在盐酸-乙酸钠(pH 5.3)支持电解质中,当含有0.0075％8-羟基喹啉时,In会产生灵敏的导数极谱波,其峰电位为-0.85伏(相对银汞齐电极),方法检出限为1 ppb,线性范围为5—500ppb。研究了极谱波的性质、机理以及络合物的组成。方法已用于纯铅中微量铟的测定。
In a hydrochloric acid-sodium acetate (pH 5.3) supporting electrolyte, In produces a sensitive derivative polarographic wave with a peak potential of -0.85 volts (vs. silver amalgam electrode) when containing 0.0075% 8-hydroxyquinoline. Method The detection limit is 1 ppb and the linear range is 5-500 ppb. The properties and mechanism of polarographic wave and the composition of complex were studied. The method has been applied to the determination of trace indium in pure lead.