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Effect of the Phase Volume Ratio on the Potential of a Liquid-Membrane Ion-Selective Electrode
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SYSNO ASEP 0101093 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Effect of the Phase Volume Ratio on the Potential of a Liquid-Membrane Ion-Selective Electrode Title Vliv poměru objemu fází na potenciál iontově selektivní elektrody s kapalnou membránou Author(s) Samec, Zdeněk (UFCH-W) RID, ORCID
Girault, H. H. (CH)Source Title Analytical Chemistry. - : American Chemical Society - ISSN 0003-2700
Roč. 76, č. 14 (2004), s. 4150-4155Number of pages 6 s. Language eng - English Country US - United States Keywords liquit-membrane ; ion-selective electrode ; two.phase liquid system Subject RIV CG - Electrochemistry R&D Projects ME 502 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z4040901 - UFCH-W Annotation Two-phase liquid system IA(w)|IX(o) comprising the interface between the aqueous solution (w) of uni-univalent electrolyte IA and an organic solvent solution (o) of a uni-univalent electrolyte IX with the common cation I+is considered as a simple model of a liquid-membrane ion-selective electrode (ISE). Taking into account the electroneutrality and mass balance conditions, the equilibrium Galvani potential difference (pd) between the aqueous and organic phases. Numeric results corroborate the symbolic expressions derived for the cases when X- and A- are extremely lipophilic and hydrophilic ions, respectively, or when the concentration ratio x is extremely large or small. In contrast to the extraction system, where both electrolytes are initially present in the aqueous phase, the effect of the phase volume ratio on the equilibrium pd in the ISE model is rather weak, unless the counterions X- and A- differ little in their lipophilicity from the target ion I+. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2005
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