ANALYSE POLAROMÉTRIQUE DE L'OXYGÈNE DISSOUS AVEC UNE MICROÉLECTRODE DE PLATINE

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Abstract
In the detn. of dissolved oxygen it becomes difficult to reproduce by the polarographic method the results exactly when a microelectrode of Pt, fixed or turning, is substituted for the Hg cathode. This difficulty is due to a progressive modification of the surface of the cathode caused by the electro-reduction of the Hg originating from the anode. Attempts to replace the Hg, calomel anode by noble metals have not given satisfactory results. It is, however, possible, by taking appropriate measures, to prevent the Hg from being deposited on the cathode. Based on these conclusions, it was possible to arrange an apparatus which permits the continuous detn. of the O2 dissolved in water during circulation.

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