Fast Linear Scan Stripping Voltammetry of Copper Using a Glassy Carbon Rotating Disk Electrode

Fast scan stripping voltammetry is applied to copper determination, using a rotating glassy carbon electrode as working electrode. Optimal conditions are determined by an experimental design where the current peak is chosen as response factor. The effects of different parameters (deposition potential, deposition time, electrode rotation rate and potential sweep) and their interdependence is optimized. A value of 2.8×10–10 M is obtained for the detection limit, with a relative standard deviation of 0.16 in four replicated assays. The method is applied to the determination of copper in tap water and in some chemicals (HClO4, HNO3, etc.).