Fig. 3
Titration 4 ml samples in an oxide graphene system (GO)–Mg2+ in absence of the metal ion (curve 1) and in the presence of Mg2+ (curve 2). Total concentration: CGO = 7.75·10−3 M; CMg = 8.75·10−4 M
Fig. 3 | BMC Chemistry
Titration 4 ml samples in an oxide graphene system (GO)–Mg2+ in absence of the metal ion (curve 1) and in the presence of Mg2+ (curve 2). Total concentration: CGO = 7.75·10−3 M; CMg = 8.75·10−4 M