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Sensitive Voltammetric Determination of Bisphenol A Based on a Glassy Carbon Electrode Modified with Copper Oxide‐Zinc Oxide Decorated on Graphene Oxide
Author(s) -
Ulubay Karabiberoğlu Şükriye
Publication year - 2019
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201800415
Subject(s) - cyclic voltammetry , graphene , electrochemical gas sensor , materials science , dielectric spectroscopy , oxide , glassy carbon , copper , zinc , x ray photoelectron spectroscopy , differential pulse voltammetry , electrochemistry , inorganic chemistry , electrode , nuclear chemistry , chemistry , chemical engineering , nanotechnology , metallurgy , engineering
A highly sensitive and selective chemical sensor was prepared based on metallic copper‐copper oxides and zinc oxide decorated graphene oxide modified glassy carbon electrode (Cu−Zn/GO/GCE) through an easily electrochemical method for the quantification of bisphenol A (BPA). The composite electrode was characterized via scanning electron microscopy (SEM), X‐Ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). The electrochemical behavior of BPA in Britton‐Robinson (BR) buffer solution (pH 7.1) was examined using cyclic voltammetry (CV). Under optimized conditions, the square wave voltammetry (SWV) response of Cu−Zn/GO/GCE towards BPA indicates two linear relationships within concentrations (3.0 nmol L −1 −0.1 μmol L −1 and 0.35 μmol L −1 −20.0 μmol L − ) and has a low detection limit (0.88 nmol L −1 ). The proposed electrochemical sensor based on Cu−Zn/GO/GCE is both time and cost effective, has good reproducibility, high selectivity as well as stability for BPA determination. The developed composite electrode was used to detect BPA in various samples including baby feeding bottle, pacifier, water bottle and food storage container and satisfactory results were obtained with high recoveries.