Development of a bio-inspired magnetic nanocomposite synthesized through semi-covalent imprinting for electrochemical determination of cholesterol in water samples

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Autor(es): dc.contributorUniversidade Estadual de Londrina (UEL)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Tecnológica Federal do Paraná (UTFPR)-
Autor(es): dc.contributorUniversidade Estadual de Campinas (UNICAMP)-
Autor(es): dc.creatorPeixoto Lins, Eduardo-
Autor(es): dc.creatorEffting, Luciane-
Autor(es): dc.creatorMaria Effting, Letícia-
Autor(es): dc.creatorDel Pilar Taboada Sotomayor, Maria-
Autor(es): dc.creatorGava Segatelli, Mariana-
Autor(es): dc.creatorBail, Alesandro-
Autor(es): dc.creatorRicardo Teixeira Tarley, César-
Data de aceite: dc.date.accessioned2025-08-21T21:57:17Z-
Data de disponibilização: dc.date.available2025-08-21T21:57:17Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2023-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/elan.202300145-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/297879-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/297879-
Descrição: dc.descriptionFecal pollution in aquatic environments by analysis of fecal coliforms along with the determination of sterol compounds, such as cholesterol (CHO) has been extensively investigated. Thus, the development of an easier, cheaper, selective, and sensitive method for CHO monitoring in aquatic environments can be a valuable tool in contributing to the analysis of fecal pollution mainly in developing countries. In the present study, a voltammetric method aiming at CHO determination in aqueous media based on a magnetic molecular imprinted polymer (MMIP) sensor is proposed. The MMIP was synthesized on the surface of silica-coated magnetite, using CHO as a template covalently bound to 3-(triethoxysilyl)propyl isocyanate (ICPTES). A suspension of MMIP was prepared in ethanol and used to modify a graphite-epoxy composite magneto-actuated electrode (m-GEC). The indirect CHO determination was based on the decrease in the current of [Fe(CN)6]3−/4− redox probe in the presence CHO. Under optimized experimental conditions (Britton-Robinson buffer 0.01 mol L−1 at pH 7.0), the parameters of square wave voltammetry were optimized through the Doehlert matrix (amplitude of 111.2 mV, potential increase of 10.8 mV and frequency of 5.54 Hz). An analytical curve ranging from 0.51 up to 11.0 μmol L−1 was obtained with a limit of detection of 0.15 μmol L−1. The developed method was applied to the analysis of the lake water sample, and the accuracy of the method was confirmed by HPLC-DAD as a reference technique.-
Descrição: dc.descriptionUniversidade Estadual de Londrina (UEL) Departamento de Química Centro de Ciências Exatas, Rodovia Celso Garcia Cid, PR 445 Km 380-
Descrição: dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho Instituto de Química de Araraquara, Rua Professor Francisco Degni, 55, Jardim Quitandinha-
Descrição: dc.descriptionGrupo de Química de Materiais e Tecnologias Sustentáveis (GQMATS) Universidade Tecnológica Federal do Paraná (UTFPR), Avenida dos Pioneiros, 3131-
Descrição: dc.descriptionInstituto Nacional de Ciência e Tecnologia (INCT) de Bioanalítica Universidade Estadual de Campinas (UNICAMP) Instituto de Química Departamento de Química Analítica, Cidade Universitária Zeferino Vaz s/n-
Descrição: dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho Instituto de Química de Araraquara, Rua Professor Francisco Degni, 55, Jardim Quitandinha-
Idioma: dc.languageen-
Relação: dc.relationElectroanalysis-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectaqueous samples-
Palavras-chave: dc.subjectcholesterol determination-
Palavras-chave: dc.subjectfecal pollution-
Palavras-chave: dc.subjectgraphite-epoxy composite magneto-actuated electrodes-
Palavras-chave: dc.subjectvoltammetry-
Título: dc.titleDevelopment of a bio-inspired magnetic nanocomposite synthesized through semi-covalent imprinting for electrochemical determination of cholesterol in water samples-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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