Figure 5

Calibration curve of Cd(II). The solution for electrode preparation contained 0.1 mol L−1 acetate buffer pH = 4.6 ± 0.1, 2 × 10−5 mol L−1 Pb(II), 1 × 10−5 mol L−1 Zn(II) and increasing concentration of Cd(II). Zn, Pb and Cd were deposited at −1.6 V for 180 s. The potential and time of zinc oxidation and further deposition of lead and cadmium were -0.95 V and 5 s, respectively.

© De Gruyter