Abstract
A method utilizing a novel technique to designate the end‐point of a diffusion controlled electro‐reducible or ‐oxidizable reaction has shown promising analytical capability. The apparatus consists of a J‐shaped, evacuated glass tube in which a column of electrolyte is suspended under tensile stress in the longer limb. One electrode is sealed into the top of the J and the other into the short limb. The formation of a minute amount of gas at the upper electrode by electrolytic discharge of hydrogen or oxygen causes the column of electrolyte to suddenly drop. It has been found that, in the constant‐current electrolysis of a suitable supporting electrolyte containing an electroreactive ion, the transition time required for the column to drop is a function of the concentration of the ion. The use of this method as an analytical tool and its relationship to chronopotentiometry are discussed.
Published Version
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