Reliability of organic phase reference electrodes in polarization measurements at liquid/liquid interfaces

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F25%3A00638094" target="_blank" >RIV/61388955:_____/25:00638094 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1572665725004552?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1572665725004552?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jelechem.2025.119381" target="_blank" >10.1016/j.jelechem.2025.119381</a>

Result language

angličtina

Original language name

Reliability of organic phase reference electrodes in polarization measurements at liquid/liquid interfaces

Original language description

Ion transfer voltammetry and solubility measurements are used to examine the reliability of the organic phase reference electrode commonly used in polarization measurements at the water (w)/organic solvent (o) interface. According to the thermodynamic treatment developed by Hung (1980), the reference potential can be controlled by the equilibrium partition of a highly hydrophobic cation between the organic (o) and the reference aqueous (w′) phase, provided that the difference between the standard ion transfer potentials of the hydrophobic cation and the counter anion present in the phase (w′) is sufficiently large and positive. This assumption is tested for the commonly investigated water/1,2-dichloroethane (1,2-DCE) and water/α,α,α-trifluorotoluene (TFT) two-phase liquid systems, where the reference cation and counter anion are represented by bis(triphenylphosphoranylidene)ammonium (BA+) and chloride, respectively. For this purpose, the standard Gibbs energies of transfer of the BA+ ion from water to TFT and 1,2-DCE were evaluated from the solubility data. It is concluded that only the potential of the organic phase reference electrode for the water/TFT system is controlled by the partition of the BA+ cation at the w′/o interface, while the potential of the organic phase reference electrode for the water/1,2-DCE interface is of a non-thermodynamic origin. Long-term stability of the reference potential is demonstrated, which is observed even in the absence of the BA+ cation in the aqueous phase (w′). The reported observations can be of practical relevance.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

<a href="/en/project/GA22-32631S" target="_blank" >GA22-32631S: Anomalous salt extraction from water to polar organic solvents: A novel mechanism of the spontaneous emulsification and practical application</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Electroanalytical Chemistry

ISSN

1572-6657

e-ISSN

1873-2569

Volume of the periodical

996

Issue of the periodical within the volume

NOV 2025

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

5

Pages from-to

119381

UT code for WoS article

001547372600001

EID of the result in the Scopus database

2-s2.0-105012534094