Author, as appears in the article.: Bartolome, Joanne P; Fragoso, Alex
Department: Enginyeria Química
URV's Author/s: Fragoso Sierra, Alex
Keywords: Vitamin-c Uric-acid Surfaces Spectrophotometric determination Reduction Oxidation Nitrate Nanotubes Cured meat Chemistry
Abstract: In this work, we evaluate two novel surfaces for the simultaneous detection of nitrite and ascorbic acid in aqueous media. Glassy carbon electrodes were first modified with small carbon nano-onions (GCE/CNO) and further functionalized either by electrografting ortho-aminophenol (oAP) groups or by physical adsorption of thionine to give electroactive surfaces that were characterized by cyclic voltammetry. The modified surfaces exhibited a fast electrochemical response and were able to detect the presence of nitrite and ascorbic acid by amperometry. The presence of both CNOs and the electroactive moiety on the electrode surface enhanced the sensitivity and lowered the limit of detection of the determinations as compared to GCE modified only with oAP or thionine. The CNO-modified electrodes showed good reproducibility and stability with time and were applied in the detection of ascorbic acid in orange juice.
Thematic Areas: Zootecnia / recursos pesqueiros Química Physical and theoretical chemistry Medicina ii Medicina i Materials chemistry Materiais Interdisciplinar Inorganic chemistry Farmacia Engenharias ii Engenharias i Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Chemistry, inorganic & nuclear Biotecnología Biodiversidade Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: alex.fragoso@urv.cat
Author identifier: 0000-0003-4839-6094
Record's date: 2024-10-12
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0020169317303134
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Inorganica Chimica Acta. 468 223-231
APA: Bartolome, Joanne P; Fragoso, Alex (2017). Electrochemical detection of nitrite and ascorbic acid at glassy carbon electrodes modified with carbon nano-onions bearing electroactive moieties. Inorganica Chimica Acta, 468(), 223-231. DOI: 10.1016/j.ica.2017.06.024
Article's DOI: 10.1016/j.ica.2017.06.024
Entity: Universitat Rovira i Virgili
Journal publication year: 2017
Publication Type: Journal Publications
Repositori URV