2026-04-17T12:03:46Zhttps://riubu.ubu.es/oai/request
oai:riubu.ubu.es:10259/100432025-09-13T00:05:21Zcom_10259_7463com_10259_5086com_10259_2604col_10259_7464
Gold nanoparticle-based amperometric sensors integrating a gel polymer membrane electrolyte for the headspace determination of ethanethiol in wines Molinero Abad, Begoña Trachioti, Maria Prodromidis, Mamas I. Domínguez Renedo, Olga Alonso Lomillo, Mª Asunción Ethanethiol Screen-printed carbon electrodes Gold nanoparticles Spark discharge Gas sensor Room temperature ionic liquids Wine analysis The evaluation of different gold nanoparticles (AuNPs) modified screen-printed carbon electrodes (SPCEs) for the determination of ethanethiol in wine is presented in this work. Two procedures, electrochemical and spark discharge modification, have been tested for depositing AuNPs onto the working electrode surface. A gel polymer membrane, based on the mixture of 1-n‑butyl‑3-methylimidazolium hexafluorophosphate (BMIM-PF6) and poly(vinylidene fluoride) (PVDF) in dimethyl sulfoxide, has been incorporated as a supporting electrolyte for the amperometric determination of the analyte in the gas phase. The developed sensors demonstrated high selectivity and sensitivity, having a detection capability of 80 μg/L (α = β = 0.05). They also exhibited a high degree of precision, with reproducibility values ranging from 0.3 to 7.6%. The different AuNP/SPCEs integrating a gel polymer membrane electrolyte have been successfully applied to the headspace amperometric determination of ethanethiol in various wine samples. 2025-01-24 2025-01-24 2025-03 info:eu-repo/semantics/article 0013-4686 http://hdl.handle.net/10259/10043 10.1016/j.electacta.2025.145710 eng Electrochimica Acta. 2025, V. 515, 145710 https://doi.org/10.1016/j.electacta.2025.145710 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-117095RB-I00/ES/DETECCION ELECTROQUIMICA SIMULTANEA DE FENOLES Y MERCAPTANOS EN VINOS/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-149522OB-I00/ES/DISPOSITIVOS ELECTROQUIMICOS MINIATURIZADOS DESECHABLES PARA LA MONITORIZACION SIMULTANEA DE ESPECIES VOLATILES CAUSANTES DE DEFECTOS ORGANOLEPTICOS EN VINOS/ http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier