Influence of micelles on the electrochemical behaviors of catechol and hydroquinone and their simultaneous determination

Abstract

A simple and highly selective electrochemical method for the simultaneous determination of CAT and HQ at a glassy carbon electrode in micellar solutions has been developed. The electrochemical behaviors of CAT and HQ in aqueous CPB and SDBS micellar solutions have been studied by cyclic voltammetry. The oxidation peak potentials shift negatively, the reduction peak potentials shift positively, and the peak currents increase in the presence of CPB for both CAT and HQ. However, the oxidation peak potentials shift positively, the reduction peak potentials shift negatively, and the peak currents decrease in the presence of SDBS for both CAT and HQ. The electrochemical kinetic parameters for CAT and HQ in aqueous CPB and SDBS micellar solutions were also determined by chronocoulometry (CC) and chronoamperometry (CA). The cyclic and pulse differential voltammetric behaviors of the system consisting of CAT coexisting with HQ were also investigated in this work. It was found that the oxidation peak potential waves of CAT and HQ were separated by 100 mV in the presence of CPB in 0.10 M PBS (pH 6.8). Therefore, CAT and HQ can be determined simultaneously in such a system. This simple method was applied to the simultaneous determination of HQ and CAT in a household tap water sample and it exhibited high selectivity.

Simultaneous Electrochemical Determination of Hydroquinone, Catechol and Resorcinol at Nitrogen Doped Porous Carbon Nanopolyhedrons-multiwall Carbon Nanotubes Hybrid Materials Modified Glassy Carbon Electrode

“…[1][2][3][4] Because of their high toxicity and low degradability in the ecological environment, HQ, CC and RE are considered as environmental pollutants by the US Environmental Protection Agency (EPA) and the European Union (EU). 5 During the application and manufacturing process of these compounds, some of them are inevitably released into the environment to contaminate rivers and ground waters.…”

“…Among them, the electrochemical methods have attracted considerable attentions due to their advantages such as fast response, cheap instrument, low cost, simple operation, time saving, and free of complicated sample pre-treatments. 14 For electrochemical methods, more attentions are focused on the simultaneous determination of CC and HQ 2,[15][16][17][18][19][20][21][22][23][24][25] and only a few works addressed on the simultaneous determination of HQ, CC and RE. 7,26 Compared to the parallel single-analyte methods, it is well-known that simultaneous detection of HQ, CC and RE means using fewer samples, reducing overall cost per assay and improving assay efficiency.…”

Simultaneous Determination of Hydroquinone, Catechol and Resorcinol at Graphene Doped Carbon Ionic Liquid Electrode

“…Therefore, a highly sensitive and selective analytical method is necessary for the simultaneous determination of the three dihydroxybenzene isomers. Up to now, various methods have been exploited for the determination of the dihydroxybenzenes, such as high performance liquid chromatography (HPLC) [3,4], spectrophotometry [5,6] Electrochemiluminescence [7], synchronous fluorescence [8], gas chromatography/mass spectrometry [9], capillary electrochromatography [10], pH-based-flow injection analysis [11], and electrochemical methods [12][13][14][15][16][17][18][19][20][21][22][23]. Among these methods, electrochemical method is of particular interest due to its high sensitivity, low cost, good selectivity, and rapid detection.…”

“…Among these methods, electrochemical method is of particular interest due to its high sensitivity, low cost, good selectivity, and rapid detection. For most electrochemical methods, more attention is focused on the simultaneous determination of CC and HQ due to their redox peaks are overlapped at ordinary electrode [12][13][14][15][16][17][18][19][20]. However, the simultaneous determination of HQ, CC, and RS by electrochemical methods is few reported.…”

A Catalytic Resonance Fluorometry Method for Determination of Hydroquinone and Its Applications

“…1,2 Therefore, it is significant to determine hydroquinone in environmental samples. 3 At present, the analytical methods for hydroquinone are mainly spectrophotometry, [4][5][6] chemiluminescence analysis, 7,8 electrochemical analysis, [9][10][11][12] chromatography, [13][14][15] and fluorometry. 16,17 Some of these methods are expensive or time-consuming or the organic solvents being used are toxic.…”