Abstract: A novel molecularly imprinted electrochemical sensor was prepared by electro-polymerization on the glassy carbon electrode using tetramethrin as the template molecule and o-anminophenol as the functional monomer. A potential induction method for template molecule elution was studied. K3[Fe(CN)6] was regarded as an electroactive probe and the preparation of the sensor and the detection conditions were optimized using cyclic voltammetry and differential pulse voltammetry (DPV). Furthermore, the imprinting effect and analytical performance of the sensor were examined. The results showed that the potential induction method exhibited a good linear relationship between the concentrations of tetramethrin in the range of 0.2 to 10 μmol/L and DPV peak current difference and it provided better template elution than the traditional soak elution method. The detection limit of our method was 0.07 μmol/L, and the average recoveries of spiked samples were between 82.9% and 98.2%. The sensor had the advantages of simple operation, quick response, high sensitivity, good stability, high selectivity, strong anti-interference capability, and low cost, and thus it would have a good application prospect.
Template and target information: tetramethrin
Author keywords: tetramethrin, O-Aminophenol, molecularly imprinted membrane, electropolymery, potential induction, sensor