Noise Analysis of Ion Transfer Kinetics at the Micro Liquid/Liquid Interface

0444407 - ÚFCH JH 2016 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Josypčuk, Oksana - Holub, Karel - Mareček, Vladimír
Noise Analysis of Ion Transfer Kinetics at the Micro Liquid/Liquid Interface.
XXXV. Moderní elektrochemické metody. Sborník přednášek mezinárodní odborné konference. Ústí nad Labem: Srsenová Lenka - Best Servis, 2015 - (Navrátil, T.; Fojta, M.; Schwarzová, K.), s. 95-99. ISBN 978-80-905221-3-8.
[Moderní elektrochemické metody /35./. Jetřichovice (CZ), 18.05.2015-22.05.2015]
Grant CEP: GA ČR GA13-04630S
Institucionální podpora: RVO:61388955
Klíčová slova: noise analysis * liquid/liquid interface * ion transfer kinetics
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie

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.
Trvalý link: http://hdl.handle.net/11104/0246930