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Abstract: In this paper, we reported a kind of electrochemical sensor based on molecularly imprinted technique, and it has been successfully applied to the determination of lead ion in water samples. With lead-gallic acid complexes as a template molecule, a molecularly imprinted membrane with lead-gallic acid complexes was prepared by electro-polymerization o-phenylenediamine method at a platinum electrode. According to the recognition of molecular imprinting film for lead-gallic acid complexes, we can indirectly detect Pb(II). Utilizing potassium ferricyanide solution as a probe, its redox current change was used to detect lead ion. The sensitivity has been improved by identification of the overall complex. There was a good linear relationship between the concentrations of Pb(II) in the forms of (lgcPb(II)) and the current changes (Δ i). The detection limit was 0.0163 nmol/L.
Template and target information: lead-gallic acid complex, lead ion, Pb(II)
Author keywords: molecularly imprinted technique, Electrochemical sensor, Pb(II), Lead-gallic acid complex