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

被引：28

作者：

Brandariz, I

Vilarino, T

Alonso, P

Herrero, R

Fiol, S

de Vicente, MES

机构：

[1] Univ A Coruna, Fac Ciencias, Dept Quim Fundamental & Ind, E-15701 La Coruna, Spain

[2] Univ Santiago Compostela, Fac Quim, Dept Quim Fis, E-15706 Santiago, Spain

来源：

TALANTA | 1998年 / 46卷 / 06期

关键词：

ionic strength; formal potential; glass electrode; potentiometry;

D O I：

10.1016/S0039-9140(98)00022-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We examined the variation with ionic strength (I, adjusted with KCl, KNO3, KBr, NaCl or NaClO4) of the formal potential (E-const) for glass electrodes exhibiting a Nernstian response (i.e. E-cell = E-const - 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. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

收藏

页码：1469 / 1477

页数：9

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