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Open Chemistry

formerly Central European Journal of Chemistry

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IMPACT FACTOR 2016 (Open Chemistry): 1.027
IMPACT FACTOR 2016 (Central European Journal of Chemistry): 1.460

CiteScore 2017: 1.45

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2391-5420
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Volume 7, Issue 4

Issues

Volume 13 (2015)

Use of the sulfide minerals pyrite and chalcopyrite as electrochemical sensors in non-aqueous solutions. The potentiometric titration of weak acids in alcohols

Ljiljana Mihajlović / Snežana Nikolić-Mandić / Branislav Vukanović / Ranđel Mihajlović
Published Online: 2009-10-06 | DOI: https://doi.org/10.2478/s11532-009-0074-3

Abstract

Natural monocrystalline pyrite and chalcopyrite were examined as new indicator electrodes for the potentiometric titration of weak acids in tert-butanol and iso-propanol. The electrodes investigated demonstrated a linear dynamic response for p-toluenesulfonic acid concentrations in the range from 0.1 to 0.001 M, with a Nernstian slope of 48 mV per decade for pyrite in tert-butanol. Sodium methylate, potassium hydroxide and tetrabutylammonium hydroxide (TBAH) proved to be suitable titrating agents. The response time was less than 12 s and the lifetime of the electrodes was higher than 1 year. The advantages of the electrodes are long-term stability, rapid response, reproducibility, easy preparation and low cost.

Keywords: Pyrite; Chacopyrite; Sensor; Non-aqueous media; Alcohols

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About the article

Published Online: 2009-10-06

Published in Print: 2009-12-01


Citation Information: Open Chemistry, Volume 7, Issue 4, Pages 900–908, ISSN (Online) 2391-5420, DOI: https://doi.org/10.2478/s11532-009-0074-3.

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© 2009 Versita Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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