Gold–Copper Film Electrode for Voltammetry Determination of Mercury in Water

Figure 3

DP-ASV curves of 5 μg/L Hg(II) solutions containing 10^-3 M HClO₄ at (a) ex situ Au-CuF/CPE (plating solution: 0.20 mg/L Au(III), 0.05 mg/L Cu(II), and 10^-3 M HClO₄; plating potential: -1100 mV; plating time: 270 s) and (b) in situ Au-CuF/CPE (analyte solution containing 0.20 mg/L Au(III), 0.05 mg/L Cu(II); other conditions as in Figure 1).

(a)

(b)