Applicability of cork as novel modifiers to develop electrochemical sensor for caffeine determination

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Federal do Rio Grande do Norte-
Autor(es): dc.contributorUniversidad de las Américas Puebla-
Autor(es): dc.contributorUniversity of Porto-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorMonteiro, Mayra K. S.-
Autor(es): dc.creatorDa Silva, Djalma R.-
Autor(es): dc.creatorQuiroz, Marco A.-
Autor(es): dc.creatorVilar, Vítor J. P.-
Autor(es): dc.creatorMartínez-Huitle, Carlos A. [UNESP]-
Autor(es): dc.creatorDos Santos, Elisama V. [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:45:01Z-
Data de disponibilização: dc.date.available2022-02-22T00:45:01Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3390/ma14010037-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/205684-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/205684-
Descrição: dc.descriptionThis study aims to investigate the applicability of a hybrid electrochemical sensor com-posed of cork and graphite (Gr) for detecting caffeine in aqueous solutions. Raw cork (RAC) and regranulated cork (RGC, obtained by thermal treatment of RAC with steam at 380◦C) were tested as modifiers. The results clearly showed that the cork-graphite sensors, GrRAC and GrRGC, exhibited a linear response over a wide range of caffeine concentration (5–1000 µM), with R2 of 0.99 and 0.98, respectively. The limits of detection (LOD), estimated at 2.9 and 6.1 µM for GrRAC and GrRGC, suggest greater sensitivity and reproducibility than the unmodified conventional graphite sensor. The low-cost cork-graphite sensors were successfully applied in the determination of caffeine in soft drinks and pharmaceutical formulations, presenting well-defined current signals when analyz-ing real samples. When comparing electrochemical determinations and high performance liquid chromatography measurements, no significant differences were observed (mean accuracy 3.0%), highlighting the potential use of these sensors to determine caffeine in different samples.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionLaboratório de Eletroquímica Ambiental e Aplicada Universidade Federal do Rio Grande do Norte-
Descrição: dc.descriptionGrupo de Investigación en Energía y Ambiente Universidad de las Américas Puebla, ExHda. Sta. Catarina Martir-
Descrição: dc.descriptionLaboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM) Chemical Engineering Department Faculty of Engineering University of Porto-
Descrição: dc.descriptionNational Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry UNESP, P.O. Box 355-
Descrição: dc.descriptionNational Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry UNESP, P.O. Box 355-
Descrição: dc.descriptionCNPq: 306323/2018-4-
Descrição: dc.descriptionCNPq: 430121/2016-4-
Descrição: dc.descriptionCAPES: 88881.156371/2017-01-
Descrição: dc.descriptionFAPESP: FAPESP 2014/50945-4-
Descrição: dc.descriptionCAPES: UIDB/50020/2020-
Formato: dc.format1-17-
Idioma: dc.languageen-
Relação: dc.relationMaterials-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCaffeine-
Palavras-chave: dc.subjectCork-
Palavras-chave: dc.subjectElectrochemical sensor-
Palavras-chave: dc.subjectGraphite-
Palavras-chave: dc.subjectModified electrode-
Título: dc.titleApplicability of cork as novel modifiers to develop electrochemical sensor for caffeine determination-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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