2026-06-29T21:02:18Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/100242025-01-24T01:05:17Zcom_10259_7463com_10259_5086com_10259_2604col_10259_7464

Alonso Lomillo, Mª Asunción Domínguez Renedo, Olga Ethanethiol Molecularly imprinted polymer Polypyrrole Gold nanoparticles Electrochemical sensor Wine This work describes a molecularly imprinted (MIP) sensor, based on the electropolymerization of pyrrole on a glassy carbon electrode (GCE), for the determination of ethanethiol. Ethanethiol was used as a template molecule for the formation of cavities in the imprinted polymer. The effect of molar ratios template molecules/functional monomers and time needed to remove the template were optimized. The developed MIP/GCE sensor presented a linear range from 6.1 to 32.4 mg L−1 with capability detection and reproducibility values of 7.2 mg L−1 and 10.4%, respectively. The sensitivity of the developed sensor was enhanced by the incorporation of gold nanoparticles (AuNPs). The AuNPs/MIP/GCE showed a capability of detection and reproducibility values of 0.4 mg L−1 and 4.1%, respectively (calibration range from 0.3 to 3.1 mg L−1). The sensor was successfully applied to the determination of ethanethiol in spiked wine samples with recoveries ranging from 99% to 107%. 2025-01-23 2025-01-23 2023 info:eu-repo/semantics/article 0039-9140 http://hdl.handle.net/10259/10024 10.1016/j.talanta.2022.123936 eng Talanta. 2023, V. 253, 123936 https://doi.org/10.1016/j.talanta.2022.123936 http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier