2026-06-21T20:56:04Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/92872024-06-20T00:05:13Zcom_10259_7463com_10259_5086com_10259_2604col_10259_7464

2024-06-19T10:56:10Z urn:hdl:10259/9287 Simultaneous quantification of 4-ethylphenol and ethanethiol in wines by headspace amperometric measurements Portugal Gómez, Paula Domínguez Renedo, Olga Alonso Lomillo, Mª Asunción 4-Ethylphenol Ethanethiol Wine Amperometry Dual screen-printed carbon electrodes Gas sensor Simultaneous analysis of 4-ethylphenol and ethanethiol has been carried out since they often coexist in wine samples producing significant organoleptic defects. Dual working screen-printed electrodes have been used for this aim. An activated fullerene C60 modified screen-printed carbon electrode (AC60/SPCE1) was used for the determination of 4-ethylphenol, while a cobalt (II) phthalocyanine modified SPCE (CoPh/SPCE2) was employed for ethanethiol detection. Headspace amperometric measurements were performed applying different potentials to the electrode system, which were coated by a commercial polyamide membrane immersed in supporting electrolyte, for the simultaneous and selective detection of both species in a single run. The constructed sensing dual system presented an exceptional detection performance with a capacity of detection of 2.7 mg/L and 0.2 mg/L for 4-ethyphenol and ethanethiol, respectively. The developed method was successfully applied for the simultaneous detection of both compounds in wine samples where it demonstrated a high degree of trueness and suitable efficiency. 2024-06-19T10:56:10Z 2024-06-19T10:56:10Z 2024-02 info:eu-repo/semantics/article 0026-265X http://hdl.handle.net/10259/9287 10.1016/j.microc.2023.109760 eng Microchemical Journal. 2024, V. 197, 109760 https://doi.org/10.1016/j.microc.2023.109760 http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier