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Natural metal sulfides as electrochemical sensors for redox titrations in γ-butyrolactone and propylene carbonate

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Abstract

Natural monocrystalline pyrite, chalcopyrite, and galena have been used as indicator electrodes for potentiometric redox titrations in γ-butyrolactone and propylene carbonate. Copper(II) solution was employed as the titrating agent. The results obtained by using these electrodes were compared with those obtained by application of a platinum electrode under the same conditions, and good agreement, reproducibility, and accuracy were obtained. The results deviated by 0.16–0.50% from those obtained by using a platinum electrode. All the electrodes showed a relatively fast response time and can be used without any time limit or without considerable divergence in the potentials. The potential jumps at the titration end-point obtained in the titration of some compounds by using a pyrite electrode are higher than those obtained by application of platinum as the indicator electrode.

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Acknowledgments

This work was supported by the Ministry of Science and Technological Development of the Republic of Serbia (Project No. 142060).

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Sciences, University of Kragujevac, P.O. Box 60, R. Domanović 12, 34000, Kragujevac, Serbia

    Zorka Stanić & Jelena Stepanović

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  1. Zorka Stanić
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  2. Jelena Stepanović
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Correspondence to Zorka Stanić.

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Stanić, Z., Stepanović, J. Natural metal sulfides as electrochemical sensors for redox titrations in γ-butyrolactone and propylene carbonate. Monatsh Chem 141, 137–142 (2010). https://doi.org/10.1007/s00706-009-0246-z

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