Figure 7
(A) Differential pulse voltammograms of Vitamin 36.5 µM D3 at (a) GCE, CuO/Ag@n-hexane − GCE and CuO/Ag@lemon extract-GCE interface (B) DPV of different concentrations (0.02–22.5 µM) of Vitamin D3 obtained at CuO/Ag@lemon extract-GCE; (C) Curve between peak current vs concentration (µM).
