Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
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Conducting Polymer-coated Electrode as a Reference/Counter Electrode in an Organic Phase and Its Application to a Two-electrode Type Thin-layer Cell for Voltammetry at the Liquid | Liquid Interface
Yumi YOSHIDASatoshi YAMAGUCHIKohji MAEDA
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2010 Volume 26 Issue 2 Pages 137-139

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Abstract

An indium tin oxide glass electrode coated with poly(3,4-ethylenedioxythiophene), PEDOT, PEDOT-ITOE, was proposed as an electrode workable as both a reference electrode and a counter one, a reference/counter electrode, in an organic phase and applied to a thin-layer cell of a two-electrode system for voltammetry at the liquid | liquid interface. By oxidizing the PEDOT film by 50% and doping a supporting electrolyte anion in an organic phase into the PEDOT film, a suitable depolarization was realized at the PEDOT | organic phase interface. The partially oxidized PEDOT-ITOE showed a Nerntian response to the supporting electrolyte anion concentration in the organic phase. The electrode potential was stable within ±3 mV for 12 h, and showed a consistent value among the PEDOT-ITOEs prepared under the same procedure (the error range was about 7 mV, n = 8).

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© 2010 by The Japan Society for Analytical Chemistry
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