Original title: Noise Analysis of Ion Transfer Kinetics at the Micro Liquid/Liquid Interface
Authors: Josypčuk, Oksana ; Holub, Karel ; Mareček, Vladimír
Document type: Papers
Conference/Event: Moderní elektrochemické metody /35./, Jetřichovice (CZ), 20150518
Year: 2015
Language: eng
Abstract: Fluctuation analysis was utilized to determine the TEA ion transfer kinetics across the water/1,2-dichloroethane interface. The average value ks = 0.34 cm s-1 is comparable with the previously reported value ks = 0.2 cm s-1, derived from electrochemical impedance spectroscopy experiments. The experimental approach utilizing a thick wall glass microcapillary to fix the interface exhibits a very small stray capacitance value, proving this system to be suitable for determining the kinetics of the fast ion transfer across a liquid/ liquid interface. Application of a method employing a small perturbation signal prevents polarization of the inner capillary surface by current flowing through the cell. The induced polarization of the capillary can affect ion concentration at the interface due to electroosmosis and thus make the kinetics data evaluation difficult or erroneous.
Keywords: ion transfer kinetics; liquid/liquid interface; noise analysis
Project no.: GA13-04630S (CEP)
Funding provider: GA ČR
Host item entry: XXXV. Moderní elektrochemické metody. Sborník přednášek mezinárodní odborné konference, ISBN 978-80-905221-3-8

Institution: J. Heyrovsky Institute of Physical Chemistry AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0246930

Permalink: http://www.nusl.cz/ntk/nusl-188002


The record appears in these collections:
Research > Institutes ASCR > J. Heyrovsky Institute of Physical Chemistry
Conference materials > Papers