Figure 1: SW voltammogram (δ current) of GSH (62.5 μmol/L) dissolved in 0.1 mol/L phosphate buffer, pH 7.5. The experimental conditions were: SW frequency f=50 Hz; SW amplitude Esw=0.02 V; step potential dE=0.005 V; deposition potential Edep=1.1 V and deposition time tdep=5 s.