title: Sensitivity and selectivity determination of bisphenol A using SWCNT-CD conjugate modified glassy carbon electrode.
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%.
authors.affiliation: College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Gao
authors.forename: Yu
authors.initials: Y
authors.lastname: Cao
authors.forename: Duanguang
authors.initials: D
authors.lastname: Yang
authors.forename: Xujun
authors.initials: X
authors.lastname: Luo
authors.forename: Yiming
authors.initials: Y
authors.lastname: Tang
authors.forename: Huaming
authors.initials: H
authors.lastname: Li
mesh_terms: D001559:Benzhydryl Compounds; D002138:Calibration; D002244:Carbon; D004566:Electrodes; D052244:Endocrine Disruptors / Q000032:analysis*; D057230:Limit of Detection; D010636:Phenols / Q000032:analysis*; D013818:Thermogravimetry; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D002244:Carbon; D052244:Endocrine Disruptors; D010636:Phenols; C006780:bisphenol A; D000098826:Bisphenol A Compounds