Fig. 7From: Fabrication of novel polymer-modified graphene-based electrochemical sensor for the determination of mercury and lead ions in water and biological samplesa Cyclic voltammograms of 1 mM HgCl2 at PGMGPE at various scan rates from 0.1 to 0.275 V/s. b Plot of anodic peak current (Ipa) as a function of scan rate. c Cyclic voltammograms of 1 mM PbCl2 at PGMGPE at various scan rates from 0.1 to 0.250 V/s. d Plot of anodic peak current (Ipa) as a function of scan rateBack to article page