Polarographic behaviour of hafxium(iv) in aqueousalcoholic mixtures

Abstract

A polarographic study of hafnium, has been carried out in lithium chloride (0.1, 0.5 and 1 M) in 5%, 25%, 50% and 75% (v/v ethanol. One polarographic wave was observed corresponding to a one-electron process agreeing with the microcoulometric study carried out at constant potential and constant current. The observed wave is well-defined and useful analytically. The half-wave potentials have been measured against the saturated calomel electrode at different conditions of pH, temperature, and height of mercury column in the concentration range between 10 −3 and 5 · 10 −3 M. The values for the diffusion current constant and the peak potentials obtained in derivative polarography, are also given.