Figure 8.
(A) Cyclic voltammograms of rGONi(OH)2-4 thin film in the absence (a) and presence of 1 (b), 2 (c) and 3 (d) mmol L−1 glycerol. (B) Chronoamperogram for rGONi(OH)2-4 thin film with four additions of 100 μmol L−1 glycerol using 0.45 V. (C) Sensitivity as function of the potential used in the chronoamperometry. (D) Chronoamperogram for rGONi(OH)2-4 thin film with glycerol additions from 10 to 800 μmol L−1. (E) Analytical curves constructed from chronoamperograms. (a–c)in (C,E) represent rGONi(OH)2-3 (a), rGONi(OH)2-4 (b) and control Ni(OH)2(c) thin films. The analyses were carried out in 1 mol L−1 NaOH aqueous solution.