Figure 5From: Trace determination of cadmium in water using anodic stripping voltammetry at a carbon paste electrode modified with coconut shell powderCyclic voltammograms of coconut shell powder-modified carbon paste electrode in 0.1 M HCl. (a) Without accumulation and (b) after 10-min accumulation of Cd (II) at a scan rate of 50 mV/S.Back to article page