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Conducting phenylenevinylene blends as electrode materials in LC amperometric detection
Author(s) -
Staes E.,
Nagels L. J.,
Verreyt G.,
Jacobs S.,
Bao Y.,
Geise H. J.
Publication year - 1997
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140091514
Subject(s) - electrode , amperometry , glassy carbon , materials science , coulometry , working electrode , reference electrode , conductive polymer , analytical chemistry (journal) , chemically modified electrode , reversible hydrogen electrode , polymer , electrochemistry , chemical engineering , chemistry , cyclic voltammetry , composite material , organic chemistry , engineering
A novel amperometric electrode based on a conducting polymer is presented and its properties are compared with those of a glassy carbon electrode. The electrode material was made by mixing 2,5‐dimethoxy‐1,4‐bis[2‐(3,4,5‐trimethoxy‐phenyl)ethenyl]benzene with iodine and polycarbonate. The blend was coated on a glassy carbon electrode by evaporation from a chloroform solution. Catecholamines were used as test substances in LC and FIA measurements. They were oxidized at a potential of +0.7 V (vs. SCE). The electrode exhibited a linear response for injected concentrations from 2.5 × 10 −6 M to 2.5 × 10 −3 M. It had a response time of 1.2 s and a coulometric efficiency of 0.74% at a linear flow rate of 1 mL/min. The electrode material is stable for several months under normal operating conditions. Hydrodynamic voltammograms showed E 1/2 values shifted by approximately 100 mV as compared to glassy carbon. The novel redox‐conducting coating is proposed as an alternative material for the development of enzyme electrodes and chemically modified electrodes.