Amperometry with two polarisable electrodes-VII: chelometric determination of indium |
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Authors: | Vydra F Vorlícek J |
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Affiliation: | Polarographic Institute of Heyrovsky, Czechoslovak Academy of Sciences Analytical Laboratory, Prague 1, Jilská 16, Czechoslovakia. |
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Abstract: | Optimum conditions have been found for the chelometric determination of indium by biamperometric titration with EDTA. Two stationary platinum electrodes (Pt-Pt) or two graphite electrodes (C-C) may be used to indicate the end-point of the titration. At pH 1-1.5 the determination is highly selective. The applied potential only influences the absolute value of the current ; the accuracy of the determinations remains constant over a wide interval of applied potential. At a potential of 1.0-1.7 V the change of current during a titration with 0.05 M EDTA solution is of the order of 10 microA. Analytical applications of the method are discussed. |
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