Abstract: A new method for the determination of melamine (MEL) indirectly by the changes of differential pulse voltammetry (DPV) current of K3[Fe(CN)6] probes after 10 min incubation (Δ I) has been established. It's based on the inhibitory effect of MEL on occupying the molecular recognition sites of surface of the electropolymerized molecular imprinting & graphene modified glassy carbon electrode (MIPPy/GR/GCE). The MIPPy/GR/GCE was characterized by cyclic voltammetry (CV), electrochemical impedance spectrometry (EIS) and scanning electron microscopy (SEM). The Δ I is linearly proportional to the negative logarithmic concentration of MEL over the range of 3.0 x 10-8 ~1.0 x 10-4 mol L-1 (R = 0.9948), the detection limit is 1.02 x 10-8 mol L-1 (S/N =3). The recoveries of samples are from 102.65% to 108.02%, the result is satisfactory when it is used to analyze the real samples.
Template and target information: melamine, MEL
Author keywords: molecularly imprinted polymer, Graphene, Melamine, sensor