Laser engraved nitrogen-doped graphene sensor for the simultaneous determination of Cd(II) and Pb(II)

Schematic illustration of the fabrication process of the nitrogen-doped laser engraved graphene modified glassy carbon electrode (N@LEG-GCE) for the simultaneous determination of cadmium (Cd(II)) and lead (Pb(II)) by square wave anodic stripping voltammetry (SWASV).213