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Investigation of ion-selective electrodes with neutral ionophores and ionic sites by EIS. II. Application to K detection |
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| Authors: | Claude Gabrielli Patrick Hemery Pierre Letellier Michele Masure Hubert Perrot Marie-Isabelle Rahmi Mireille Turmine |
| Affiliation: | aUPR 15 du CNRS, Physique des Liquides et Électrochimie, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris Cedex 05, France;bLaboratoire de Chimie Macromoléculaire, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris Cedex 05, France;cLaboratoire d'Energétique et Réactivité aux Interfaces, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris Cedex 05, France |
| Abstract: | The impedance of an ion-selective electrode (ISE) to potassium with valinomycin as the ionophore and KBΦ4 as the ionic sites was measured. The membrane was made of PVC with DNP as a plasticizer. The influence of the content of the plasticizer and the membrane thickness was investigated. The concentrations of the ionophore and the ionic sites were changed to modify the response on the ISE. Finally, the selectivity was tested in terms of impedance. All impedance experiments were correlated to the potentiometric curves plotted under the same experimental conditions. The measured impedances were compared to the model proposed in the previous paper (paper I). A good agreement was found. |
| Keywords: | Valinomycin PVC Potassium Electrochemical impedance |
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