Molecularly imprinted polypyrrole based electrochemical sensor for selective determination of 4-ethylphenol

TALANTA

卷:207

Article

Dominguez-Renedo, Olga¹  Marta Navarro-Cunado, A.²  Arnaiz-Lozano, Victor¹  Asuncion Alonso-Lomillo, M.¹ 

[1] Univ Burgos, Fac Sci, Analyt Chem Dept, Pza Misael Banuelos S-N, Burgos 09001, Spain

[2] Univ Burgos, Fac Sci, Phys Chem Dept, Pza Misael Banuelos S-N, Burgos 09001, Spain

关键词: 4-ethylphenol;    Molecularly imprinted polymer;    Polypyrrole;    Electrochemical sensor;    Wine;   

DOI  :  10.1016/j.talanta.2019.120351

来源: Elsevier

【 摘 要 】

This work describes the development of an electrochemical sensor based on a molecularly imprinted polymer (MIP) for sensitive and selective determination of 4-ethylphenol in wine. The sensor has been built by means of the electrosynthesis of the MIP on a glassy carbon electrode surface using cyclic voltammetry. The electro-polymerization has been performed in the presence of 4-ethylphenol and pyrrole as template molecule and functional monomer, respectively. The influence of the molar ratios of template molecules to functional pyrrole monomers and the time needed to remove the template have been optimized taking into account the differential pulse voltammetric response of 4-ethylphenol. Under the optimal experimental conditions the developed MIP/GCE sensor shows good capability of detection (0.2 mu M, alpha = beta = 0.05) and reproducibility (3.0%) in the concentration range from 0.2 to 34.8 pM. The influence of possible interfering species in the analytical response has been studied and the sensor has successfully been applied to the determination of 4-ethylphenol in different wine samples.

【 授权许可】

Free