Simultaneous Detection of Catechol and Hydroquinone Using Acetylene Black and Gold Nanoparticle Composite Modified Electrodes

Abstract

Quantitative analysis of dihydroxybenzene isomers holds great significance to agricultural chemistry, food safety and environmental protection. In this work, we demonstrate a facile strategy to determine catechol and hydroquinone by using acetylene black and gold nanoparticle composite modified electrodes (Au/AB/GCE). Compared with bare glassy carbon electrode (GCE), Au/AB/GCE showed much better performance in electrocatalytic oxidation-reduction of catechol and hydroquinone. The linear correlation between the peak currents and analyte concentrations suggested the simultaneous detection with ultralow limits of detection (0.5 μM and 1 μM for catechol and hydroquinone, respectively). Besides, the determination is selective and out of interference of common inorganic ions and organic compounds. Anson equation was employed to make a reasonable hypothesis, that the increased surface area and electrical conductivity of Au/AB/GCE contributed these good results. This strategy may become a promising means for ratiometric and simultaneous detection of catechol and hydroquinone in water with convenience and high sensitivity.

MOF-derived Cu/N–C Composite Based Electrochemical Sensor for Simultaneous Detection of Catechol and Hydroquinone

“…As shown in Table I, the linear range and LOD of Cu/N-C/GCE are comparable to other sensors or even better than some sensors, suggesting that Cu/N-C/GCE exhibits good sensing performance for the simultaneous detection of CC and HQ. [40][41][42][43][44][45] Selectivity, reproducibility and stability.-The selectivity of Cu/ N-C/GCE was evaluated in the PBS containing 50 μM CC and HQ with interfering substances by DPV method. As shown in Fig.…”

An Amperometric Biomedical Sensor for the Determination of Homocysteine Using Gold Nanoparticles and Acetylene Black-Dihexadecyl Phosphate-Modified Glassy Carbon Electrode

“…As a special type of carbon black with a regular porous structure, acetylene black (AB) has excellent electrical conductivity, a large surface area and a strong adsorption capacity [ 14 ]. In addition, compared with other carbon materials, such as carbon nanotubes, graphene and carbon nanofibers, etc., the ultra-low cost of AB helps to maintain the low cost of composite materials [ 15 ], which makes its widespread application in electrochemical sensing fields possible [ 16 , 17 , 18 , 19 ].…”