✍ Scribed by Ivan Šinko; Jan Doležal
No coin nor oath required. For personal study only.
Anodic stripping polarography can be successfully used in the analysis of low concentrations of some cations in various compounds and in the study of several theoretical phenomena of electrochemical reactions at a stationary electrode. Although this method has been used in analytical work only since 1958, when Kemula and Kublik 1 proposed the application of the hanging mercury drop electrode (HMDE), some 400 reports on its applicability in the solution of various analytical and theoretical problems are found in the literature. In a survey of the latest bibliography on the subject Hrab~inkovfi and Dole~al 2 list 274 references on anodic and cathodic stripping polarography using different microelectrodes. There are no data in the literature on the effect of the cathodic current of oxygen on the oxidation currentpotential curve, an effect that may lead to inaccurate results; it is true, however, that some authors demand that oxygen be carefully removed from the solution. The present paper is concerned, firstly, with the effect of dissolved oxygen in the solution on the oxidation currents, secondly, with the procedure by which oxygen concentration in the solution can be controlled, and, thirdly, with the purification of nitrogen used for the removal of oxygen from the solution.
EXPERIMENTAL
Apparatus
📜 SIMILAR VOLUMES
Stresses generated during the anodic oxidation of tungsten in 0.1 M H,SO, solution were measured as a function of applied current density and potential step by using a beam deflection technique. The stresses which amounted to a few GPa were developed in the oxide film and were separated into the vol