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An Exfoliated Graphite-Based Bisphenol A Electrochemical Sensor
Department of Applied Chemistry, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, Johannesburg, South Africa
Indian Institute of Science, Department of Inorganic and Physical Chemistry, Bangalore 560012, India
* Author to whom correspondence should be addressed.
Received: 21 June 2012; in revised form: 31 July 2012 / Accepted: 21 August 2012 / Published: 27 August 2012
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
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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.
Ndlovu T, Arotiba OA, Sampath S, Krause RW, Mamba BB. An Exfoliated Graphite-Based Bisphenol A Electrochemical Sensor. Sensors. 2012; 12(9):11601-11611.
Ndlovu, Thabile; Arotiba, Omotayo A.; Sampath, Srinivasan; Krause, Rui W.; Mamba, Bhekie B. 2012. "An Exfoliated Graphite-Based Bisphenol A Electrochemical Sensor." Sensors 12, no. 9: 11601-11611.