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本文研究了在溴化钾乳酸-CTMAB体系中痕量铅、镉催化电流的极谱行为。从底液组成发现了铅、镉均能形成三元络合物,获得灵敏的吸附催化波,从而提高了铅、镉的测定灵敏度,测定下限铅为6 ppb、镉为0.6ppb,试验了多种共存离子的影响。方法用于高纯锌中痕量铅、镉的测定,其结果与标准值一致.
In this paper, the polarographic behavior of trace lead and cadmium currents in potassium bromide lactate-CTMAB system was studied. From the composition of the bottom liquid, we found that lead and cadmium both can form ternary complex and obtain sensitive adsorption catalytic wave, so as to improve the determination sensitivity of lead and cadmium. The lower limit lead was 6 ppb and the content of cadmium was 0.6 ppb Effect of coexisting ions. Method for the determination of trace amounts of lead and cadmium in high-purity zinc, the results of which are consistent with the standard values.