Effect of ionic strength on the formal potential of the glass electrode in various saline media

Brandariz, Isabel; Vilariño, Teresa; Alonso Suárez, Pablo A.; Herrero, Roberto; Fiol López, Sarah; Sastre de Vicente, Manuel

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http://hdl.handle.net/2183/14114

Effect of ionic strength on the formal potential of the glass electrode in various saline media

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Brandariz_Isabel_1998_Effect_ionic_strength_formal_potential_glass_electrode_saline_media.pdf (326.7 KB)

Identifiers

URI: http://hdl.handle.net/2183/14114

Publication date

1998-08

Authors

Brandariz, Isabel

Vilariño, Teresa

Alonso Suárez, Pablo A.

Herrero, Roberto

Fiol López, Sarah

Sastre de Vicente, Manuel

Bibliographic citation

Brandariz I, Vilariño T, Alonso P, Herrero R, Fiol S, Sastre De Vicente ME. Effect of ionic strength on the formal potential of the glass electrode in various saline media. Talanta. 1998;46(6):1469-77

Abstract

We examined the variation with ionic strength (I, adjusted with KCl, KNO3, KBr, NaCl or NaClO4) of the formal potential (Econst) for glass electrodes exhibiting a Nernstian response (i.e. Ecell=Econst−s log [H+]). For this purpose, we investigated the different factors included in the formal potential, so we obtained reported values for the liquid junction potential as a function of ionic strength and determined the logarithm of the activity coefficient for the proton in various saline media, using Pitzer equations.