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本文应用电位法,采用各种酸性介质,极谱底液,在氧化电位大于+0.5V,氧化时间大于10秒的条件下,将残留于银基球型汞膜电极表面的各种干扰物质强制氧化,使其成为可溶性离子离开电极表面进入溶液,更新电极。利用本电极在极谱底液里测定镉,其结果与滴汞电极比较相当接近;未经分离连续测定矿石、矿物样品中常量和微量的铜、铅、镉、锌等元素,其结果与国家标准值相当吻合,回收率大,相对误差小,效果好。
In this paper, potentiostatic method, the use of a variety of acidic media, polarographic bottom solution, the oxidation potential is greater than +0.5 V, the oxidation time is greater than 10 seconds under the conditions of the remaining in the silver-based mercury electrode surface of a variety of interfering substances forced Oxidation, making it soluble ions from the electrode surface into the solution, renew the electrode. The results showed that the electrode was quite close to the drop mercury electrode. The continuous and non-separated determination of copper, lead, cadmium, zinc and other elements in ore and mineral samples, The standard value is quite consistent, the recovery rate, the relative error is small, the effect is good.