Fig. 7From: Voltammetric analysis of pholcodine on graphene-modified GNPs/PTs with green assessmenta SWV voltammograms of different concentrations (10–45 mg/L) of PHL, b SWV calibration curve of PHL. c DPV voltammograms of different concentrations (10–45 mg/L) of PHL, and d DPV calibration curve of PHLBack to article page