Fig. 1. ASVs for four successive additions of Ag(I) in 10 mg L1 steps together with
background response obtained at the unmodified glassy carbon electrode in 0.1 M
acetate buffer solution (pH 4.5); accumulation at
0.6 V for 60 s, equilibration step
of 15 s V; square-wave anodic stripping voltammetric scan with a frequency of
25 Hz, an amplitude of 50 mV and a potential step of 4 mV; cleaning step of 30 s at
+0.4 V. Inset shows the corresponding peak current plot.