Electrochemical sensing and nano molar level detection of Bisphenol-A with molecularly imprinted polymer tailored on multiwalled carbon nanotubes

摘要

A rapid, effective and simple method for quantitative determination of Bisphenol-A (BPA) is important in environmental monitoring and health perspectives. In this work, a multi-walled carbon nanotube (MWCNT) based molecularly imprinted polymer (MIP) was successfully developed and used for modifying glassy carbon electrode (GCE) for the electrochemical detection of BPA. FTIR, Raman, XRD, SEM and AFM techniques were used for confirming the stepwise modifications in each stage. A well defined electrochemical response was obtained for BPA in cyclic voltammetry and differential pulse voltammetry. The influence of accumulation time and pH was studied and optimized. The electro catalytic sensing of BPA is possible with accessible range from 400.00 mu M to 0.10 nM with detection limit of 0.02 nM. The stability, reproducibility and repeatability of the MIP/GCE sensor were also investigated. The applicability of the synthesized sensor in real life situation was confirmed by quantifying the amount of BPA in baby feeding bottle extracts. (C) 2018 Elsevier Ltd. All rights reserved.