Abstract
In the present work, palladized aluminum as a new type of solid electrode has been applied for the determination of copper by differential pulse anodic stripping voltammetry (DPASV) technique. The proposed electrode was prepared rapidly by electroless deposition of metallic palladium on the aluminum surface and had good sensitivity and selectivity. The experimental variables such as electrode preparation conditions, type and concentration of supporting electrolyte, supporting electrolyte pH, preconcentration potential, preconcentration time, convection intensity, and scan rate of electrode potential were optimized. Under the optimum conditions, a linear calibration graph was achieved in the concentration range of 3–60 µM with a correlation coefficient of 0.999 and a detection limit of 2.8 µM. It was found that the proposed method was free from common interferences which were presented in the used real sample. The palladized aluminum electrode was used successfully to determine of copper content in nutritional supplement tablets, and suitable recovery results were obtained.
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