Use of the sulfide minerals pyrite and chalcopyrite as electrochemical sensors in non-aqueous solutions. The potentiometric titration of weak acids in alcohols
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 / AlcoholsSource:
Central European Journal of Chemistry, 2009, 7, 4, 900-908Publisher:
- Versita, Warsaw 41
Funding / projects:
- Razvoj novih i poboljšanje postojećih spektroskopskih i elektroanalitičkih metoda za praćenje stanja životne sredine (RS-MESTD-MPN2006-2010-142060)
DOI: 10.2478/s11532-009-0074-3
ISSN: 1895-1066
WoS: 000270541000031
Scopus: 2-s2.0-70349969972
Collections
Institution/Community
Inovacioni centar / Innovation CentreTY - JOUR AU - Mihajlović, Ljiljana AU - Nikolić-Mandić, Snežana D. AU - Vukanovic, Branislav AU - Mihajlovic, Randel PY - 2009 UR - https://cherry.chem.bg.ac.rs/handle/123456789/1016 AB - 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. PB - Versita, Warsaw 41 T2 - Central European Journal of Chemistry T1 - Use of the sulfide minerals pyrite and chalcopyrite as electrochemical sensors in non-aqueous solutions. The potentiometric titration of weak acids in alcohols VL - 7 IS - 4 SP - 900 EP - 908 DO - 10.2478/s11532-009-0074-3 ER -
@article{ author = "Mihajlović, Ljiljana and Nikolić-Mandić, Snežana D. and Vukanovic, Branislav and Mihajlovic, Randel", year = "2009", 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.", publisher = "Versita, Warsaw 41", journal = "Central European Journal of Chemistry", title = "Use of the sulfide minerals pyrite and chalcopyrite as electrochemical sensors in non-aqueous solutions. The potentiometric titration of weak acids in alcohols", volume = "7", number = "4", pages = "900-908", doi = "10.2478/s11532-009-0074-3" }
Mihajlović, L., Nikolić-Mandić, S. D., Vukanovic, B.,& Mihajlovic, R.. (2009). Use of the sulfide minerals pyrite and chalcopyrite as electrochemical sensors in non-aqueous solutions. The potentiometric titration of weak acids in alcohols. in Central European Journal of Chemistry Versita, Warsaw 41., 7(4), 900-908. https://doi.org/10.2478/s11532-009-0074-3
Mihajlović L, Nikolić-Mandić SD, Vukanovic B, Mihajlovic R. Use of the sulfide minerals pyrite and chalcopyrite as electrochemical sensors in non-aqueous solutions. The potentiometric titration of weak acids in alcohols. in Central European Journal of Chemistry. 2009;7(4):900-908. doi:10.2478/s11532-009-0074-3 .
Mihajlović, Ljiljana, Nikolić-Mandić, Snežana D., Vukanovic, Branislav, Mihajlovic, Randel, "Use of the sulfide minerals pyrite and chalcopyrite as electrochemical sensors in non-aqueous solutions. The potentiometric titration of weak acids in alcohols" in Central European Journal of Chemistry, 7, no. 4 (2009):900-908, https://doi.org/10.2478/s11532-009-0074-3 . .