【摘要】 电解预浓缩技术是一种有效的分离和寓集手段。本文利用这种分离富集方法,采用汞膜铂丝电积一火焰原子吸收法测定氢前元素镉。电解预浓缩技术应用很多。由于水溶液中氢离子影响,对电位较负的氢前元素往往受到限制。镀汞铂电极电积一火焰原子吸收法利用了氢在汞上超电位较高的特点。较为成功地把这一技术应用于氢前元素。本文利用这种方法对镉做了一系列条件实验和干扰实验,并测定了饮用水中镉含量。方法的相对标准偏差为5.33%,结果是满意的。更多还原

【Abstract】 Electrochemical preconcentration techniqueis an effective separation and preconcentration method. In this paper, five elements, Cd, Pb, Bi, Ni, Cu were investigated with mercury film electrode electrochemical preconcentration-atornic absorption spectrophotometry, especially for Cd.The electrolysis of many ions with more negative potential than proton did not carry out in the aqueous solutions. Use of the mercury film electrodes, on which proton has a higher overpotential than on the Pt electrode it has, the analysis of many metals became available and the apphcation range was extended. In this paper, some typical elements were studied. The result was satisfactory.更多还原