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Título:
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Estimating the Change in Liquid Junction Potential on Glass Electrodes
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Autores:
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ISABEL BRANDARIZ, Autor ;
JOSE L BARRIADA, Autor ;
CARLOS TABOADA-PAN, Autor ;
MANUEL E. SASTRE DE VICENTE, Autor
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Tipo de documento:
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documento electrónico
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ISBN/ISSN/DL:
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68221
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Dimensiones:
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pp. 1110–1114
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Nota general:
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En: Volume 13, Issue 13, pages 1110–1114, September 2001
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Langues:
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Inglés
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Clasificación:
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ELECTRODOS
VIDRIO
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Resumen:
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Formal potential of combination glass electrodes, a necessary parameter commonly needed in the determination of stoichiometric equilibrium constants, has been calculated at several temperatures and ionic strength values. These data, together with the activity coefficient of the proton calculated with Pitzer equations, have been used to study the change in the liquid junction potential, Ej. Since the asymmetry potential is unknown, absolute values of Ej can not be calculated. However, it has been possible to determine the variation as a function of the ionic strength in KCl as background electrolyte. A linear relationship has been found for the three temperatures studied. Dependence with temperature of the term –s log mH+ represents the most important influence on the temperature dependence of the formal potential of a combination glass electrode.
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