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Characterization of an Integrated On-Capillary Dual Electrode for Capillary Electrophoresis-Electrochemistry

✍ Scribed by Lisa A. Holland; Nancy Murray Harmony; Susan M. Lunte

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 94 KB
Volume: 11
Category: Article
ISSN: 1040-0397
DOI: 10.1002/(sici)1521-4109(199905)11:5<327::aid-elan327>3.0.co;2-g

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✦ Synopsis

An integrated on-capillary dual electrode electrochemical detector for capillary electrophoresis consisting of two platinum wires is described. The electrodes are permanently ®xed so that no alignment is necessary. The detector was evaluated for direct amperometric detection in the series con®guration. Collection ef®ciencies 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.

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