Feedback-amplified electrochemical dual-plate boron-doped diamond microtrench detector for flow injection analysis.
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.
Department of Chemistry, University of Bath, Bath, UK.
Grace E M
GE
Lewis
Department of Chemistry, University of Bath, Bath, UK.
Andrew J
AJ
Gross
Department of Chemistry, University of Bath, Bath, UK.
Barbara
B
Kasprzyk-Hordern
Department of Chemistry, University of Bath, Bath, UK.
Anneke T
AT
Lubben
Department of Chemistry, University of Bath, Bath, UK.
Frank
F
Marken
D001895:Boron / Q000737:chemistry*; D018130:Diamond / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000295:instrumentation*; D004867:Equipment Design; D005246:Feedback; D017022:Flow Injection Analysis / Q000295:instrumentation* / Q000379:methods; D006873:Hydroquinones / Q000032:analysis; D010100:Oxygen
D006873:Hydroquinones; D018130:Diamond; D001895:Boron; D010100:Oxygen; C031927:hydroquinone
Boron-doped diamond; Chromatography; Feedback amplification; Oxygen; Quinine; Separation