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Abstract: A novel multiple-ion imprinted sensor based on graphene oxide/fullerene composite(GO-C60) was developed for simultaneous and selective determination of Pb(II), Cd(II) and Cu(II). The multiple-ion imprinted polymer was prepared with methacrylic acid and edetic acid as the functional monomer and ligand, respectively. The multiple-ion imprinted sensor was prepared by dispensing the imprinted polymer onto the GO-C60 modified carbon electrode surface. The performance of multiple-ion imprinted sensor was investigated using cyclic voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy in details. Under the optimized conditions, a linear relationship existed between the response currents of the multiple-ion imprinted sensor and the negative logarithm of ion concentrations ranging from 1.0 × 10-9 mol/L to 5.0 × 10-7 mol/L with the detection limit of 5.0 × 10-10, 5.0 × 10-10 and 1.0 × 10-10 mol/L for Pb(II), Cd(II) and Cu(II), respectively. The multiple-ion imprinted sensor was successfully used for simultaneous detection of trace level Pb(II), Cd(II) and Cu(II) ions in real samples
Template and target information: lead ion, Pb(II), cadmium ion, Cd(II), Copper ion, Cu(II)
Author keywords: multiple metal ions, imprinting, Electrochemical sensor, graphene oxide, fullerene composite