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Abstract: A kind of new malachite green (MG) polypyrrole (PPy) molecularly imprinted (MIP)/gold nanoparticle composite (AuNPs) film-modified glassy carbon electrode (MG-MIPPPy/AuNPs/GCE) was prepared by potentiostatic deposition of gold nanoparticle on glassy carbon electrode at - 0.2 V (vs. SCE) for 100 s, pyrrole (Py) as monomer, and MG as template molecule (molar ratio = 1:1) by cyclic voltammetry (CV) electropolymerization. And various modified electrodes were characterized by SEM and EIS and CV methods. Potassium ferricyanide was used as a probe; the concentration of MG was indirectly detected by the linear relationship between the current change value (Δ I DPV) and the logarithm value of concentration of MG. Under the optimal conditions, there was a linear relationship between the Δ I DPV and the negative logarithm of concentration in the range of 2.73 × 10-9 M ~ 2.74 × 10-6 M (R = 0.9961). The detection limit is 3.57 × 10-11 M (S/N = 3). The sample recovery was 98.82 to 103.38%. These analysis results of real samples were satisfactory
Template and target information: malachite green, MG
Author keywords: molecularly imprinted polymer, gold nanoparticles, Malachite green, Glassy carbon electrode