Figure 3From: Trace determination of cadmium in water using anodic stripping voltammetry at a carbon paste electrode modified with coconut shell powderCyclic voltammograms of the carbon paste electrode. (a) Unmodified CPE and (b) coconut shell powder-modified carbon paste electrode in potassium ferricyanide solution with 0.1 M KCl at the scan rate of 100 mV/S.Back to article page