L-tyrosine Molecularly Imprinted Sensor Sensitive Membrane Preparation and Properties of Research

L-Tyrosine as template molecule, o-phenylendiamine as functional monomer, on the gold electrode surface sensitive in situ synthesized molecularly imprinted polymer membranes. By cyclic voltammetry(CV), differential pulse voltammetry(DPV) and electrochemical impedance spectroscopy(EIS) to investigate the performance of the electrode. CV method tests show that the template molecules L-tyrosine in phosphate buffer solution(PH=8.0) o-PD and functional monomers to polymerization and adsorption on the gold electrode surface, and before and after polymerization and elution peak current have obvious difference before and after the template molecules. DPV test results show that in 1×10-2~2.0 mg/m L range, the peak current and a linear relationship with the concentration of L-tyrosine, the detection limit of 2.0 mg/m L. Chooseing the recognition experiment results show that the molecularly imprinted modified electrodes are similar to L-tyrosine L-phenylalanine, L-alanine, L-tryptophan, the current response of L-aspartate is very small, that molecularly imprinted sensor membrane have specific recognition of L-tyrosine.EIS method test showed that the imprinted electrode for L-tyrosine molecular recognition.