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Characterization of an Integrated On‐Capillary Dual Electrode for Capillary Electrophoresis‐Electrochemistry
Author(s) -
Holland Lisa A.,
Harmony Nancy Murray,
Lunte Susan M.
Publication year - 1999
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/(sici)1521-4109(199905)11:5<327::aid-elan327>3.0.co;2-g
Subject(s) - capillary electrophoresis , amperometry , electrode , capillary action , electrochemistry , analytical chemistry (journal) , detector , chemistry , platinum , chromatography , electrophoresis , working electrode , materials science , organic chemistry , optics , physics , composite material , catalysis
An integrated on‐capillary dual electrode electrochemical detector for capillary electrophoresis consisting of two platinum wires is described. The electrodes are permanently fixed so that no alignment is necessary. The detector was evaluated for direct amperometric detection in the series configuration. Collection efficiencies were calculated for a series of phenolic acids exhibiting different degrees of chemical reversibility. The linearity and limits of detection at both electrodes were determined. The selectivity of the system was demonstrated by the detection of ferulic acid in beer.