ZHANG Di,LI Qiang-xiang,WANG Zhi-mei,et al.Detection of Oxcarbazepine Using an Electrochemical Sensor Based on Magnetic Molecularly Imprinted Membrane[J].Journal of Instrumental Analysis,2021,40(08):1136-1144.
ZHANG Di,LI Qiang-xiang,WANG Zhi-mei,et al.Detection of Oxcarbazepine Using an Electrochemical Sensor Based on Magnetic Molecularly Imprinted Membrane[J].Journal of Instrumental Analysis,2021,40(08):1136-1144. DOI: 10.19969/j.fxcsxb.20110602.
Detection of Oxcarbazepine Using an Electrochemical Sensor Based on Magnetic Molecularly Imprinted Membrane
In this paper, a magnetic molecularly imprinted electrochemical sensor(MNPs-MIP/MCPE) for the detection of oxcarbazepine(OXC) was prepared, using 4-vinylpyridine and methacrylate as raw materials. Firstly, according to the calculation of the density functional theory(DFT/B3LYP/6-31 + G), the best combination and the best combination ratio of the OXC with functional monomers were successfully screened and constructed. Subsequently, a magnetic molecularly imprinted membrane(MNPs-MIP) capable of recognizing OXC was synthesized based on the precipitation polymerization method, which was coated on the surface of a carbon paste electrode(MCPE) to make a magnetic molecularly imprinted sensor of MNPs-MIP/MCPE. The sensor was used for the determination of different concentrations of OXC solutions with differential pulse voltammetry(DPV). Results showed that, the current signals of the system had good linear relationship(,r ,>, 0.999) with OXC concentrations in the ranges of 5 × 10,-8,-3 × 10,-6 ,mol/L and 3 × 10,-6,-1.5 × 10,-4 ,mol/L, and their linear equations were ,I,p,(μA) = 1.755 + 1.097,c, (μmol/L) and ,I,p,(μA)= 0.131 + 5.177,c, (μmol/L), respectively. The detection limit for OXC(LOD = 3,S,/,m,) was 2.06 × 10,-8, mol/L. The sensor was used for the detection of OXC concentration in the actual samples, with recoveries of 99.4%-101% and relative standard deviations (RSD) of 1.5%-2.5%.
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