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

An Exfoliated Graphite-Based Bisphenol A Electrochemical Sensor

1,* , 1,2
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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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) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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