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Sensors 2012, 12(9), 11601-11611; doi:10.3390/s120911601
Article

An Exfoliated Graphite-Based Bisphenol A Electrochemical Sensor

1
,
1,* , 1,2
,
1
 and
1
1 Department of Applied Chemistry, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, Johannesburg, South Africa 2 Indian Institute of Science, Department of Inorganic and Physical Chemistry, Bangalore 560012, India
* Author to whom correspondence should be addressed.
Received: 21 June 2012 / Revised: 31 July 2012 / Accepted: 21 August 2012 / Published: 27 August 2012
(This article belongs to the Section Chemical Sensors)
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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.
Keywords: exfoliated graphite electrode; bisphenol A; phenol; electrode fouling; pollutant exfoliated graphite electrode; bisphenol A; phenol; electrode fouling; pollutant
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Ndlovu, T.; Arotiba, O.A.; Sampath, S.; Krause, R.W.; Mamba, B.B. An Exfoliated Graphite-Based Bisphenol A Electrochemical Sensor. Sensors 2012, 12, 11601-11611.

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