REPLACEMENT OF THE GLASS ELECTRODE BY GRAPHITE AT ACID-BASE POTENTIOMETRIC TITRATIONS

Authors

  • György INZELT Institute of Chemistry, Eötvös Loránd University, Budapest, Hungary. Email: inzeltgy@chem.elte.hu. https://orcid.org/0000-0002-9480-1188
  • Katalin BORSOS Institute of Chemistry, Eötvös Loránd University, Budapest, Hungary. Corresponding author: inzeltgy@chem.elte.hu.

Keywords:

potentiometric titration, acid-base titration, paraffin-impregnated graphite electrode

Abstract

Examples are shown that the paraffin-impregnated graphite (PIGE) electrode can be used as a replacement of the fragile and expensive glass electrodes in acid-base potentiometric titration. Based on the preliminary investigations this, simple, robust and cheap electrode can be an alternative of the electrodes used in the practice at present. The open-circuit potential of the paraffin-impregnated graphite in aqueous solutions of different pHs is not sensitive to the presence of oxygen. Because of the large difference between the open-circuit potential and the pH-dependent formal potential determined by using the mid-peak potential obtained by cyclic voltammetry, it can be stated that the pH dependence is due to a surface ionic exchange process with the participation of the oxidized surface groups of carbon.

References

M. Cremer, Zeitschrift für Biologie, 1906, 47, 562.

H. Bach, F. Baucke, D. Krause (eds.), “Electrochemistry of glasses and glass melts, including glass electrodes”, Springer, Berlin, 2001.

H. Kahlert, “Potentiometry” in “Electroanalytical Methods: Guide to Experiments and Applications”, F. Scholz (ed.), Springer, Berlin, 2nd edition, 2010, chapter II.9.

F.G.K. Baucke, Journal of Solid State Electrochemistry, 2011, 15, 23.

L. Kékedy, “Műszeres analitikai kémia” Erdélyi Múzeum-Egyesület, Kolozsvár-Cluj, 1995, chapters 12 and 13.

R.G. Bates, “Determination of pH - Theory and Practise”, Wiley, New York, 1973, pp. 280-294.

Y. Wen, X. Wang, Journal of Electroanalytical Chemistry, 2014, 45, 714.

A. Fog, R.P. Buck, Sensors and Actuators, 1984, 5, 137.

J. Bercik, Chemické Zwesti, 1970, 14, 372.

E. Pungor, É. Szepesváry, Periodica Polytechnica, 1972, 16, 326.

P. Riyazuddin, D. Devika, Journal of Chemical Education, 1997, 74, 1198.

F. Regisser, M-A. Lavoie, G.Y. Champagne, D. Bélanger, Journal of Electroanalytical Chemistry, 1996, 415, 47.

J. Bobacka, A. Ivaska, A. Lewenstam, Chemical Reviews, 2008, 108, 329.

O. Korostynska, K. Arshak, E. Gill, A. Arshak, Sensors, 2007, 7, 3027.

H. He, J. Klinowski, M. Forster, A. Lerf, Chemical Physics Letters, 1998, 287, 53.

D.A. Fiedler, F. Scholz, “Electrochemical studies of solid compounds and materials” in “Electroanalytical Methods: Guide to Experiments and Applications”; F. Scholz (ed.), Springer, Berlin, 2nd edition, 2010, chapter II.8.

Downloads

Published

2015-09-30

How to Cite

INZELT, G. ., & BORSOS, K. . (2015). REPLACEMENT OF THE GLASS ELECTRODE BY GRAPHITE AT ACID-BASE POTENTIOMETRIC TITRATIONS. Studia Universitatis Babeș-Bolyai Chemia, 60(3), 23–30. Retrieved from https://studia.reviste.ubbcluj.ro/index.php/chemia/article/view/8464

Issue

Section

Articles

Similar Articles

<< < 11 12 13 14 15 16 17 18 19 20 > >> 

You may also start an advanced similarity search for this article.