Simultaneous Electrochemical Determination of Hydroquinone and Bisphenol A using a Carbon Paste Electrode Modified with Silver Nanoparticles

Abstract

In this paper, a rapid and sensitive modified electrode for the simultaneous determination of hydroquinone (HQ) and bisphenol A (BPA) is proposed. The simultaneous determination of these two compounds is extremely important since they can coexist in the same sample and are very harmful to plants, animals and the environment in general. A carbon paste electrode (CPE) was modified with silver nanoparticles (nAg) and polyvinylpyrrolidone (PVP). The PVP was used as a reducing and stabilizing agent of nAg from silver nitrate in aqueous media. The nAg‐PVP composite obtained was characterized by transmission electron microscopy and UV‐vis spectroscopy. The electrochemical behavior of HQ and BPA at the nAg‐PVP/CPE was investigated in 0.1 mol L−1 B−R buffer (pH 6.0) using cyclic voltammetry (CV) and square wave voltammetry (SWV). The results indicate that the electrochemical responses are improved significantly with the use of the modified electrode. The calibration curves obtained by SWV, under the optimized conditions, showed linear ranges of 0.09–2.00 μmol L−1 for HQ (limit of detection 0.088 μmol L−1) and 0.04–1.00 μmol L−1 for BPA (limit of detection 0.025 μmol L−1). The modified electrode was successfully applied in the analysis of water samples and the results were comparable to those obtained using UV‐vis spectroscopy.

Understanding the endocrine disruptor and determination of bisphenol A by functional Cu-BTABB-MOF/rGO composite as facile rapid electrochemical sensor: an experimental and DFT investigation

“…The customized electrodes have good sensitivity, a low detection limit, a short reaction time, and a high selectivity for determining BPA. 11–13 Hasnat et al developed a glassy carbon electrode (GCE) that was customized with ternary metal oxides (TMO) employing 5% Nafion. Due to its larger surface area, TMO has a more suitable nano-environment for BPA evaluation.…”

Voltammetric determination of itopride using carbon paste electrode modified with Gd doped TiO2nanotubes

“…In this field carbon paste working electrode achieved a special importance; this importance comes from its simple fabrication steps, in addition to low cost and wide potential window. Various materials such as nanoparticles could be added to carbon paste mixture during preparation to enhance the sensitivity and selectivity of the electrodes [21,22].…”

Modification of Carbon Paste Electrode with Ag Nanoparticle for Voltammetric Determination of Phenol

“…However, these techniques need expensive instrumentation, so we need another analytical method for the determination of phenols in the sample. One method that can be used is electrochemistry which has several advantages such as high sensitivity and selectivity, simple modification, and economical [8], [9], [10], [11], [12]. In voltammetric techniques, usually using electrodes that the reactivity of an electrode depends on the composition of its constituent materials, so that optimization of the composition is needed to obtain a good electrode.…”