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97308 Metal-Metal Oxide pH Sensor: The Effect of Anions and Aeration on pH Measurements

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Product Number: 51300-97308-SG
ISBN: 97308 1997 CP
Author: J.H. Payer, K. Fink, I. Song
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This work examines the electrochemical growth of iridium oxide electrodes for use as a PH sensor or and further evaluates the usefulness of these probes in a variety of solutions with sulfur containing anions. Electrodes were grown and calibrated according to reports in the literature and exposed to sulfate-,sulfite-, bisulfite-, and thiosulfate containing solutions in various concentrations. No effect of changes in sulfate and sulfite ion concentration were observed, however, significant changes in the calbration behavior of the electrodes was observed after the exposure to the solutions with bisulphite and thiosulfate ions. Keywords: pH sensor, iridium, iridium oxide, anion effect, electrochemical film growth
This work examines the electrochemical growth of iridium oxide electrodes for use as a PH sensor or and further evaluates the usefulness of these probes in a variety of solutions with sulfur containing anions. Electrodes were grown and calibrated according to reports in the literature and exposed to sulfate-,sulfite-, bisulfite-, and thiosulfate containing solutions in various concentrations. No effect of changes in sulfate and sulfite ion concentration were observed, however, significant changes in the calbration behavior of the electrodes was observed after the exposure to the solutions with bisulphite and thiosulfate ions. Keywords: pH sensor, iridium, iridium oxide, anion effect, electrochemical film growth
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