Fig. 11From: Ag+ colorimetric sensor based on graphene oxide/nano-platinum compositeOptimization of pH during color development. Reaction condition: GO/PtNPs 0.047 μg/mL, H2O2 0.02 M, TMB 0.02 Mm, pH = 2.2, 3, 4, 5, 6, 7, 8, t = 5 min, λ = 652 nmBack to article page