Citation: WEI Shou-Lian, WU Jia-Yu, HUANG Xiang-Jin, XIE Chun-Sheng. Preparation and Application of Malachite Green Electrochemical Sensor Based on Molecularly Imprinted Polymer[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(1): 145-152. doi: 10.19756/j.issn.0253-3820.191349 shu

Preparation and Application of Malachite Green Electrochemical Sensor Based on Molecularly Imprinted Polymer

1.
College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China;
2.
Zhaoqing Institute for Food Control, Zhaoqing 526060, China

Received Date: 23 June 2019
Revised Date: 19 November 2019

Fund Project: This work was supported by the College Students' Innovative Entrepreneurial Training Program from Zhaoqing University (No. 201810580019) and the Science and Technology Planning Project of Zhaoqing City (No. 2018N017).

A molecularly imprinted electrochemical sensor for specific recognition of malachite green (MG) was prepared by electropolymerization of o-phenylenediamine on the surface of porous carbon nanofiber (PCNF) modified glassy carbon electrode with MG as template molecule. The electrochemical performance of the sensor was characterized by differential pulse voltammetry (DPV), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The experimental parameters, such as the amount of PCNF, molar ratio of template molecule to functional monomer, scan cycle of CV, eluent, elution time, pH value of sample solution and incubation time, were optimized. Under optimal conditions, the peak current was linear to MG concentration in the range of 0.10-10.0 nmol/L, with a detection limit of 0.042 nmol/L. The prepared sensor possessed excellent selectivity, reproducibility and stability, and was applied to the detection of MG in commercially available fresh grass carp and aquaculture water samples with recoveries of 82.0%-96.5%.
- Molecularly imprinted electrochemical sensor,
- Electropolymerization,
- Porous carbon nanofiber,
- Malachite green
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沈阳化工大学材料科学与工程学院沈阳 110142