Utility of Activated Glassy Carbon and Pencil Graphite Electrodes for Voltammetric Determination of Nalbuphine Hydrochloride in Pharmaceutical and Biological Fluids

Figure 6

(a) Calibration graphs of NP⋅HCl in spiked urine samples by using SWV method at PGE electrode,  mol L⁻¹,  mol L⁻¹,  mol L⁻¹,  mol L⁻¹,  mol L⁻¹, and  mol L⁻¹. (b) Calibration graphs of NP⋅HCl in spiked urine samples by using SWV method at GCE electrode,  mol L⁻¹,  mol L⁻¹,  mol L⁻¹,  mol L⁻¹,  mol L⁻¹,  mol L⁻¹,  mol L⁻¹, and  mol L⁻¹.

(a)

(b)