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提出了以溴化钾-水杨酸-硫酸羟胺-硫酸溶液为底液,采用单扫描极谱法测定锌、锑渣氧粉中铟的新方法。实验条件下,铟于-0.59V(相对于饱和甘汞电极)处产生一个灵敏的极谱波。结果表明,铟的峰电流与其浓度在0.008—40μg/mL范围内有良好的线性关系,检出限为0.002μg/mL。用本法测定实际样品中的微量铟,其相对标准偏差为0.6%—1.5%,加标回收率为95.3%—102.8%,结果满意。
A new method for the determination of indium in zinc and antimony slag oxygen by single sweep polarography with potassium bromide - salicylic acid - hydroxylamine sulfate - sulfuric acid as the bottom liquid was proposed. Under experimental conditions, indium produced a sensitive polarographic wave at -0.59V (vs. saturated calomel electrode). The results showed that there was a good linear relationship between the peak current of indium and its concentration in the range of 0.008-40μg / mL with a detection limit of 0.002μg / mL. The method of this method for the determination of trace indium samples, the relative standard deviation of 0.6% -1.5%, the standard recovery was 95.3% -102.8%, with satisfactory results.