Preparation of electrochemical sensor for lead(II) based on molecularly imprinted film

摘要

A high selective voltammetric sensor for Pb~(2+) was introduced. The feasibility of utilizing strong interactions between Schiff bases and metal ion to prepare the molecularly imprinted polymers (MIPs) electrochemical sensor for Pb~(2+) in aqueous solutions was studied. Some parameters affecting sensor response were optimized and then a calibration curve was plotted. A dynamic linear range of 3.00 × 10~(-7) to 5.00 × 10~(-5) mol/L was obtained. The redox process of Pb~(2+) on the imprinted electrode is controlled by surface reaction. The stability and the life of imprinted membrane were improved by storing into diluted Pb~(2+) ion solution. The proposed method was applied to determination of Pb~(2+) in the Yellow River.