An exfoliated graphite-based bisphenol a electrochemical sensor

Thabile Ndlovu, Omotayo A. Arotiba, Srinivasan Sampath, Rui W. Krause, Bhekie B. Mamba

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

The use of an exfoliated graphite (EG) electrode in the square wave voltammetric detection of bisphenol A (a model phenolic pollutant) in water, whereby the phenolic electrode fouling challenge is mitigated, is described. The oxidation peak of BPA was observed at about 0.45 V in phosphate buffer solution at pH 10. The current response exhibited a linear relationship with the concentration over a range from 1.56 μM-50 μM. The detection limit was calculated to be 0.76 μM. The EG electrode surface was renewed after each measurement with excellent reproducibility. A real sample application was also investigated.

Original languageEnglish
Pages (from-to)11601-11611
Number of pages11
JournalSensors
Volume12
Issue number9
DOIs
Publication statusPublished - Sept 2012

Keywords

  • Bisphenol A
  • Electrode fouling
  • Exfoliated graphite electrode
  • Phenol
  • Pollutant

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering

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