Stripping voltammetry on palladized aluminum: A novel sensing platform for trace analysis of copper

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 sensi-tivity and selectivity. The experimental variables such as electrode preparation conditions, type and concen-tration 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 mu M with a correlation coefficient of 0.999 and a detection limit of 2.8 mu M. 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.

Automated summary

In this study, palladized aluminum was used as a new type of solid electrode for the determination of copper using the differential pulse anodic stripping voltammetry (DPASV) technique. The preparation of the electrode involved electroless deposition of metallic palladium on the aluminum surface, resulting in good sensitivity and selectivity. Various experimental variables were optimized, and under the optimal conditions, a linear calibration graph was achieved for copper concentration determination. The proposed method showed no interference and was successfully applied for determining copper content in nutritional supplement tablets.