Electrophoresis 2015-08-01

Feedback-amplified electrochemical dual-plate boron-doped diamond microtrench detector for flow injection analysis.

Grace E M Lewis, Andrew J Gross, Barbara Kasprzyk-Hordern, Anneke T Lubben, Frank Marken

Index: Electrophoresis 36 , 1866-71, (2015)

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Abstract

An electrochemical flow cell with a boron-doped diamond dual-plate microtrench electrode has been developed and demonstrated for hydroquinone flow injection electroanalysis in phosphate buffer pH 7. Using the electrochemical generator-collector feedback detector improves the sensitivity by one order of magnitude (when compared to a single working electrode detector). The diffusion process is switched from an analyte consuming "external" process to an analyte regenerating "internal" process with benefits in selectivity and sensitivity. © 2015 The Authors. ELECTROPHORESIS Published by WILEY-VCH Verlag GmbH & Co. KGaA.