Research Article

Voltammetry Determination of Pb(II), Cd(II), and Zn(II) at Bismuth Film Electrode Combined with 8-Hydroxyquinoline as a Complexing Agent

Figure 2

Cyclic voltammetric curves of Pb(II), Cd(II), and Zn(II) at GCE and BiFE with and without oxine (10 ppb Pb, 10 ppb Zn, and 5 ppb Cd in HEPES buffer pH 6).