Interfacial potentials at the interface between two immiscible electrolyte solutions: Some problems in definitions and interpretation

Vladislav S. Markin, Alexander G. Volkov

Research output: Contribution to journalArticle

13 Scopus citations


Some problems concerning definition and calculation of the interfacial potential difference at the interface between two immiscible electrolyte solutions are discussed. Among them are the calculation of the distribution potential for an unsymmetrical electrolyte, which is proved to depend on electrolyte concentration, contrary to generally accepted opinion. Equations are presented for potential difference in the cases of Donnan equilibrium, of two electrolytes with a common ion, and of ion complexing in one of the phases. Finally, the equation for interfacial potential in the presence of a redox reaction at the interface between two immiscible liquids is derived. The novel notions of interfacial redox and mixed potentials are introduced.

Original languageEnglish (US)
Pages (from-to)382-392
Number of pages11
JournalJournal of Colloid and Interface Science
Issue number2
Publication statusPublished - 1989


ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces

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