Voltammetric studies with different electrode systems. Part II. Tungsten as reference electrode in polarography

Abstract

The tungsten electrode has properties similar to the molybdenum electrode, which has been used successfully as a reference electrode in polarography. The study was carried out on a d.c. polarograph with a dropping-mercury electrode and a tungsten or molybdenum reference electrode system for silver and zinc reductions, as well as on a cathode-ray polarograph with silver-tungsten, silver-molybdenum, silver amalgam-tungsten and silver amalgam-molybdenum electrode systems for the reduction of various cations. For zinc reduction, tungsten and molybdenum electrodes behave in a similar way, but generally the performance of tungsten electrode does not compare favourably with that of the molybdenum electrode, especially for silver reduction.