Reduction of the FeS₂O₃ ⁺ Ion at the Dropping Mercury Electrode

Abstract

THE technique of capacity flow¹, admirably adapted to the study of transient compounds, demands complete homogeneity of the contents of the reaction cell, in contradistinction to the technique of polarography, which depends on there being a concentration polarization. Exploratory experiments showed, however, that the two techniques could be combined, and adequate polarograms obtained, in solutions stirred by rapid streams of nitrogen; under these conditions the capacity flow technique could be used to hold the concentration of transient intermediates, such as the thiosulphatoferric ion (FeS₂O₃ ⁺) constant, so that its reduction might be studied.