Research output: Contribution to journal › Article › peer-review
Paradox of the Variation of the Bulk Resistance of Potassium Ion-Selective Electrode Membranes within Nernstian Potentiometric Response Range. / Kondratyeva, Ye O.; Solovyeva, E. V.; Khripoun, G. A.; Mikhelson, K. N.
In: Russian Journal of Electrochemistry, Vol. 55, No. 11, 01.11.2019, p. 1118-1126.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Paradox of the Variation of the Bulk Resistance of Potassium Ion-Selective Electrode Membranes within Nernstian Potentiometric Response Range
AU - Kondratyeva, Ye O.
AU - Solovyeva, E. V.
AU - Khripoun, G. A.
AU - Mikhelson, K. N.
PY - 2019/11/1
Y1 - 2019/11/1
N2 - Abstract: Bulk resistance and other electrochemical properties of membranes of K+-selective electrodes (ISEs) containing valinomycin are measured by means of chronopotentiometry and electrochemical impedance. It is shown that the bulk resistance of the membranes, within the Nernstian potentiometric response range, increases along decrease of KCl concentration in solution. Analogous results were reported earlier for Ca2+ and NO$$_{3}^{ - }$$ ISEs. This non-constancy of the bulk resistance is in conflict with current views on the mechanism of ISEs response. Tentatively, this paradox is ascribed to heterogeneity of membranes due to water uptake from solution.
AB - Abstract: Bulk resistance and other electrochemical properties of membranes of K+-selective electrodes (ISEs) containing valinomycin are measured by means of chronopotentiometry and electrochemical impedance. It is shown that the bulk resistance of the membranes, within the Nernstian potentiometric response range, increases along decrease of KCl concentration in solution. Analogous results were reported earlier for Ca2+ and NO$$_{3}^{ - }$$ ISEs. This non-constancy of the bulk resistance is in conflict with current views on the mechanism of ISEs response. Tentatively, this paradox is ascribed to heterogeneity of membranes due to water uptake from solution.
KW - chronopotentiometry
KW - electrochemical impedance
KW - ion-selective electrodes
KW - membrane bulk resistance
KW - potassium
KW - valinomycin
UR - http://www.scopus.com/inward/record.url?scp=85076433449&partnerID=8YFLogxK
U2 - 10.1134/S1023193519110090
DO - 10.1134/S1023193519110090
M3 - Article
AN - SCOPUS:85076433449
VL - 55
SP - 1118
EP - 1126
JO - Russian Journal of Electrochemistry
JF - Russian Journal of Electrochemistry
SN - 1023-1935
IS - 11
ER -
ID: 48928969