A new extremely sensitive method for the determination of paracetamol by differential pulse voltammetry (DPV) using a micro-crystalline natural graphite-polystyrene composite film modified electrode (CFE) was developed. The experimental parameters, such as pH of Britton-Robinson buffer and potentials for regeneration of the electrode surface, were optimized. Under optimized conditions in Britton-Robinson buffer (pH 4.0), linear calibration curves were obtained in the range of 0.02-100 μmol l-1 of paracetamol. The limit of determination was 0.034 μmol l-1 which shows high sensitivity of the developed method. The method was applied for the determination of paracetamol in pharmaceutical formulations and in human urine model samples.
- Differential pulse voltammetry
- Graphite-polystyrene composite
- Human urine samples
- Modified electrode
- Tablet samples
ASJC Scopus subject areas
- Chemical Engineering(all)