Polyaminoanthraquinone Modified Electrodes as Electroanalytical Sensors

摘要

Poly 1-amino-9,10-anthraquinone, PAAQ, films were prepared by the electropolymerization of 1- amino-9,10-anthraquinone, AAQ, on platinum substrates. The polymerization process was carried out-1 in both nonaqueous (Acetonitrile containing 0.1 mole L LiClO4 as supporting electrolyte) or aqueous-1 (6.0 mol L H2SO4) media. The electropolymerization process is fast and economic. The preparedfilms are stable and have been used as sensors for the electroanalytical determination of p- aminophenol, ascorbic acid, dopamine, hydroquinone, catechol, pyrogallol, cerium chloride andepinephrine. The determination is based on the cyclovoltammogramic method. The cyclic voltammetry-1 was always carried out under the same conditions, where a scan rate of 100 mV s in the specifiedpotential range for each electrolyte at room temperature were used. A range of concentration between-4 -1 0.01 to 1.0x10 mol L analyte was perfectly determined. The determination process is based on theoxidation peak currents of the analyte in the cyclic voltammogram obtained by the PAAQ modifiedelectrode. A calibration curve was drawn for each analyte from which any unknown concentration inthe specified range of measurements could be accurately obtained from the value of the peak current.