铅、镉在玻碳镀汞电极、饱和甘汞电极和铂电极下在盐酸介质中于 - 0 .4 6V、- 0 .6 8V处有溶出峰。根据这一原理可以采用静态电位溶出法同时测定饮用水中的铅、镉。该法具有操作简单、灵敏度高、重现性好等优点 ,且仪器价格便宜 ,测试成本较低 ,值得在基层单位推广。1　材料与 Lead and cadmium have a dissolution peak at-.4 6V and -0.80V at a glassy carbon electrode, a saturated calomel electrode and a platinum electrode in a hydrochloric acid medium. According to this principle, the static potential dissolution method can be used to determine the lead and cadmium in drinking water simultaneously. The method has the advantages of simple operation, high sensitivity, good reproducibility and the like, and the low price of the instrument and the low test cost are worth popularizing in the grass-roots units. 1 material and