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Abstract: Based on the intermolecular interaction, a molecularly imprinted polymer electrochemical sensor with specific identification of cavity on gold electrode surface was proposed with o-aminophenol as functional monomers and morin as template molecule. The performance and effect of MIP were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Factors affecting the properties of sensor, such as polymeric membrane ratio, scanning cycles, elution time and adsorption time were investigated. Substances which had a similar structure to morin was used to compared the selective response. The result showed that the sensor had a good selectivity to morin. Under the optimized experiment conditions, the current response of the imprinted sensor was linear to the concentration of morin in the range of 0.05-1.7 μmol/L with linear equation as follows: I(μA)= 1.0800lgc(mol/L)+ 9.3599(R=0.9934), and the detection limit of 0.1 μmol/L. The sensor was used to determine the content of morin in black tea samples, and the recoveries of standard addition were between 104.0% and 108.0%.
Template and target information: morin
Author keywords: molecularly imprinted, morin, Electrochemical sensor, electropolymerization