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J Hazard Mater. 2012 Jan 15;199-200:111-8. doi: 10.1016/j.jhazmat.2011.10.066. Epub 2011 Oct 29.

Sensitivity and selectivity determination of bisphenol A using SWCNT-CD conjugate modified glassy carbon electrode.

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  • 1College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China.

Abstract

In this study, we demonstrated a highly sensitive electrochemical sensor for the determination of bisphenol A (BPA) in aqueous solution by using single-walled carbon nanotubes (SWCNTs)/β-cyclodextrin (β-CD) conjugate (SWCNT-CD) modified glassy carbon electrode (GCE). The cyclic voltammetry results show that the modified GCE exhibits strong catalytic activity toward the oxidation of BPA with a well-defined cyclic voltammetric peak at 0.543 V. The response current exhibits a linear range between 10.8 nM and 18.5 μM with a high sensitivity (1256 μA mM(-1)). The detection limit of BPA is 1.0 nM (S/N=3). The enhanced performance of the fabricated sensor can be attributed to the combination of the excellent electrocatalytic properties of SWCNTs and the molecular recognition ability of β-CD. The sensor was successfully applied to determine BPA leached from real plastic samples with good recovery, ranging from 95% to 103%.

Copyright © 2011 Elsevier B.V. All rights reserved.

PMID:
22100222
[PubMed - indexed for MEDLINE]
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