Phenols electrochemical sensor based on ionic liquid-graphene oxide sensitive membrane
A technology of ionic liquid and graphene, applied in the field of electroanalytical chemistry, can solve the problems of cumbersome operation, time-consuming, lack of high sensitivity and selectivity, etc., and achieve simple operation process, simple instrument requirements, good conductivity and enrichment effect of ability
Inactive Publication Date: 2013-11-13
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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The invention belongs to the technical field of electroanalytical chemistry and specifically discloses a novel ionic liquid 4-hydroxy-1-methyl-1-(3-pyrrole propyl)-piperidine bromine salt and an electrochemical sensor based on an ionic liquid-graphene oxide composite nanometer material modified electrode. According to the invention, interface characteristics of the modified electrode are inspected by AC (alternating current) impedance spectroscopy and electrochemical behaviors of honokiol on the modified electrode are researched by voltammetry. As shown by the result, honokiol has a pair of reversible redox peaks on the modified electrode. Compared with a bare glassy carbon electrode, the modified electrode has the advantages that the peak current of the redox peaks of the honokiol on the modified electrode is greatly reinforced, a good linear relation is built between the peak current and honokiol of which the concentration is between 3.0*10<-8> and 1.0*10<-5> mol.L-1, and the detection limit is low. The electrochemical sensor prepared by the invention is successfully applied to the detection of honokiol in traditional Chinese medicine cortex magnoliae officinalis, so that the industrial prospect is good.
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