Differential Pulse Anodic Stripping Voltammetry Detection of Cadmium with Nafion-Graphene Modified Bismuth Film Electrode

摘要

In this work, a sensitive electrochemical platform for determination of cadmium was obtained usinggraphene-Nafion modified bismuth film glassy carbon electrode by differential pulse anodic strippingvoltammetry (DPASV) analysis. The performances of the graphene-modified sensor were systemicallystudied. It demonstrated that the graphene-modified sensor exhibited superior analytical performance-1 -1 -1 for cadmium over a linear range from 1 g L to 100 g L , with a detection limit of 0.3 g L . It wasalso successfully differentiated cadmium form other interferent (such as zinc salts, calcium salts,benzene etc.). As a result, this graphene-modified sensor proved to be a reliable and environmentfriendly tool for the effective monitoring of cadmium ions existing in tap water and residues ofcadmium in the drug.