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纯金属铅中测定铜与铋,常用比色法分别测定。比色法测定铅中的铋,手续较烦,且灵敏度不太高。若用经典的极谱分析,虽可同时测定这两种元素,但灵敏度更低。本文用阳极溶出伏安法,以自制螺旋式悬汞电极在盐酸介质中测定了纯金属铅中铜与铋。由于铜峯铋峯不易分开,故在选择底液,试验共存元素的干扰方面,作了一系列的试验,从而确定了同时测定这两种元素的实验方案。
Determination of pure copper and bismuth in lead, commonly used colorimetric determination. Colorimetric determination of lead in the bismuth, more annoying procedures, and the sensitivity is not too high. If the classic polarographic analysis, although both elements can be measured at the same time, but the sensitivity is lower. In this paper, anodic stripping voltammetry was used to determine the copper and bismuth in pure metallic lead by using self-made spiral hanging mercury electrode in hydrochloric acid medium. As the peak of bismuth peak is not easy to separate, so in the choice of base fluid, the interference of co-existence of elements tested, made a series of experiments to determine the simultaneous determination of these two elements of the experimental program.