Research Article

Simultaneous Determination of Zn(II), Cd(II), Pb(II), and Cu(II) Using Differential Pulse Anodic Stripping Voltammetry at a Bismuth Film-Modified Electrode

Figure 2

(a) CV curves of Zn, Cd, Pb, and Cu at different pH values (15 ppm Zn(II), Cd(II), and Pb(II), 500 ppb Bi(II) in 0.1 M acetate buffer, and accumulation for 120 s at –1.4 V); (b) pH dependence of Ip; (c) pH dependence of Ep.
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