Citation: CHEN Xiao, TAN Xue-Cai, YAN Jun, Wu Ye-Yu, LI Xiao-Yu, ZHANG Hui, CHEN Quan-You, FENG De-Fen, JIN Ying-Xin. Preparation of Promecarb Electrochemical Sensor Based on 3D-Graphene and Molecularly Imprinted Polymer[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(12): 1834-1839. doi: 10.11895/j.issn.0253-3820.160366 shu

Preparation of Promecarb Electrochemical Sensor Based on 3D-Graphene and Molecularly Imprinted Polymer

School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Key Laboratory of Guangxi Colleges and Universities for Food Safety and Pharmaceutical Analytical Chemistry, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Nanning 530008, China

Received Date: 15 May 2016
Revised Date: 13 September 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 21365004, 21065001 and the Natural Science Foundation of Guangxi Province, China(No. 2013GXNSFDA019006).

A sensitive electrochemical sensor for promecarb was prepared based on molecularly imprinted strategy by thermal polymerization. The molecularly imprinted polymers (MIP) were synthesized by using promecarb as template molecule, acrylamide (AM) as functional monomer, ethylene glycol acrylate, maleic rosin ester (EGMRA) as a cross-linking, homemaking 3D graphene as sensitizing materials to modify glassy carbon electrode surface, and synthesize the promecarb molecular imprinting electrochemical sensor. 3D graphene was characterized by scanning electron microscopy (SEM). The properties of the sensor were tested via cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). The results showed that promecarb concentration in the range of 8.0×10^-8-8.0×10^-6 mol/L had a good linear relationship (linear correlation coefficient R=0.9954) with current, and the detection limit was 7.3×10^-8 mol/L (S/N=3). The imprinted factor β of promecarb molecularly imprinted sensitive film was 3.88, the selection factor α was far greater than 1 compared to the three structural analogs. The imprinted sensor was successfully used to determine promecarb in lettuce samples with recoveries ranging from 96.7% to 98.7% by using standard addition method.
- Promecarb,
- Molecular imprinted electrochemical sensor,
- 3D-graphene
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