2026-04-17T22:11:46Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/100432025-09-13T00:05:21Zcom_10259_7463com_10259_5086com_10259_2604col_10259_7464

00925njm 22002777a 4500 dc Molinero Abad, Begoña author Trachioti, Maria author Prodromidis, Mamas I. author Domínguez Renedo, Olga author Alonso Lomillo, Mª Asunción author 2025-03 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. 0013-4686 http://hdl.handle.net/10259/10043 10.1016/j.electacta.2025.145710 Ethanethiol Screen-printed carbon electrodes Gold nanoparticles Spark discharge Gas sensor Room temperature ionic liquids Wine analysis Gold nanoparticle-based amperometric sensors integrating a gel polymer membrane electrolyte for the headspace determination of ethanethiol in wines