Determination of Bisphenol A in Beverages by an Electrochemical Sensor Based on Rh2O3/Reduced Graphene Oxide Composites

Rongguang Shi,Mengmeng Xu,Aifeng Liu,Xiaoli Yuan,Zongshan Zhao

doi:10.3390/app8122535

Abstract

A novel electrochemical sensor, based on a Rh2O3–reduced graphene oxide (rGO) composite modified carbon electrode, has been developed for detecting bisphenol A (BPA) in beverages. The prepared Rh2O3/rGO and its precursor materials were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). Under optimum conditions, the sensor presented good electrochemical performance for analyzing BPA, with a linear range of 0.6–40 μM, detection limit of 0.12 μM, good reproducibility, and excellent stability. The good performance can be attributed to the combination of the good catalytic properties of Rh2O3 and good conductivity of rGO. The sensor is directly used for detecting BPA in the residual solutions of four beverages after simple filtration, with satisfactory recoveries of 93–99%.

Highlights

Bisphenol A (BPA), one of the most produced and used chemicals, has been widely used for preparing industrial polymers, such as polycarbonate, epoxy resin, and thermosensitive paper [1].it is often involved in various food contact materials
O3–NP, it3 displayed uniform characteristics while a relatively smoother surface was observed in theRh composite, compared with that composed of network structures
A Rh2 O3 –reduced graphene oxide (rGO) modified glassy carbon electrode (GCE) has been successfully fabricated for detecting bisphenol A (BPA), which presents good catalytic performance

Summary

Introduction

Bisphenol A (BPA), one of the most produced and used chemicals, has been widely used for preparing industrial polymers, such as polycarbonate, epoxy resin, and thermosensitive paper [1]. It is often involved in various food contact materials (i.e., canned packaging, bottles, and lacquer coating). Especially in these food contact materials, has inevitably lead to its exposure to human beings via food and drinking water [2,3]. Legislation against BPA usage in some infant food package and bottles has been enacted, in many countries all over the world [8]

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