期刊
ELECTROANALYSIS
卷 29, 期 11, 页码 2551-2558出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201700359
关键词
Gold nanoparticles; Modified sensors; Sotalol; Uric acid; Tetrazolium blue
The electrochemical oxidation of Sotalol (SOT) based on Tetrazolium Blue (TB)/gold nanoparticles (GNPs)-modified carbon paste electrodes (CPE) have been studied in the presence of sodium lauryl sulphate (SLS). Cyclic voltammetry (CV), differential pulse voltammetry (DPV), chronoamperometry and electrochemical impedance spectroscopy (EIS) techniques have all been utilized within this study. GNPs and TB have a synergetic effect-giving rise to highly improved electrochemical responses and provide an advantageous platform for the basis of an electrochemical sensor with excellent performance. The experimental parameters, electrodeposition time, pH and scan rate have all been examined and optimized. The sensing of SOT via DPV is found to exhibit a wide linear dynamic range of 1.0 x 10(-7)-7.5 x 10(-) M-4 in pH 2. LOD and LOQ were calculated and found to correspond to 2.5 x 10(-8) M and 8.3 x 10(-8) M, respectively. The suggested sensor has been used successfully for SOT determination in pharmaceutical samples and human urine as real samples. Satisfactory recoveries of analyte from these samples are demonstrated indicating that the suggested sensor is highly suitable for clinical analysis, quality control and a routine determination of SOT in pharmaceutical formulations.
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