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我们对铅、镉的碘化物的极谱性能进行了研究,发现在弱酸性介质中,铅、镉均能以PbI_4~(2-)、CdI_4~(2-)络离子形式吸附在滴汞表面上,在示波极谱仪上能产生灵敏度较高的导数极谱波。利用这两个波能同时测定铅和镉。实验确定底液适宜条件为9％NaAc·3H_2O-0.45％吡啶-0.014％动物胶-0.14％六次甲基四胺-2％KI-1.4％抗坏血酸-2％HBr溶液。
We studied the polarographic properties of lead and cadmium iodides and found that both Pb and Cd could be adsorbed on the surface of drop mercury in PbI_4 ~ (2 -) and CdI_4 ~ (2-) complex ions in weak acid medium On the oscilloscope can produce polarographic polarographic polarographic wave with higher sensitivity. Use these two waves to simultaneously determine lead and cadmium. Experiments to determine the optimum conditions for the bottom of the liquid 9% NaAc · 3H_2O-0.45% pyridine -0.014% animal glue -0.14% hexamethylenetetramine -2% KI-1.4% ascorbic acid -2% HBr solution.