Silica Gel Functionalized with 4-Amino-5-(4pyridyl)-4H-1,2,4-triazole-3-thiol and their Use as a Copper Sorbent and Electromediator for Voltammetric Detection of Ascorbic Acid

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorMagossi, Maiara de Souza-
Autor(es): dc.creatorMaraldi, Vitor Alexandre-
Autor(es): dc.creatorMagossi, Mariana de Souza-
Autor(es): dc.creatorDias Filho, Newton Luiz-
Autor(es): dc.creatorCarmo, Devaney Ribeiro do-
Data de aceite: dc.date.accessioned2021-03-11T01:14:06Z-
Data de disponibilização: dc.date.available2021-03-11T01:14:06Z-
Data de envio: dc.date.issued2019-10-04-
Data de envio: dc.date.issued2019-10-04-
Data de envio: dc.date.issued2018-10-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/elan.201800361-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/185059-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/185059-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionProcesso FAPESP: 2012/054381-
Descrição: dc.descriptionIn this work, the 3-chloropropyl silica gel (SG) was prepared and organofunctionalized with 4-amino-5-(4pyridyl)-4H-1,2,4-triazole-3-thiol (SGA), that was characterized by infrared spectroscopy (FTIR) and cyclic voltammetry (CV). The cupric ions (Cu2+) sorption on the silica functionalized surface (CuSGA) were performed in aqueous solution, at room temperature. It was performed a systematic study about voltammetric behavior of CuSGA, where the cyclic voltammogram of graphite paste electrode modified with CuSGA exhibited a single redox pair with formal potential (E-theta ')=0.30 V assigned to the process Cu+/Cu2+, (KCl 1.0 mol L-1, v=20 mV s(-1)). The graphite paste electrode modified with CuSGA was sensitive to different concentrations of ascorbic acid and then an analytical curve could be constructed, with a linear response of 6.0x10(-6) to 9.0x10(-5) mol L-1 (R=0.9988) and a relative standard deviation of +/- 2.5 % (n=3). The detection limit (3 sigma) and amperometric sensitivity were 4.78x10(-6) mol L-1 and 115.96 mA/mol L-1, respectively.-
Formato: dc.format2660-2667-
Idioma: dc.languageen-
Publicador: dc.publisherWiley-Blackwell-
Relação: dc.relationElectroanalysis-
Direitos: dc.rightsclosedAccess-
Palavras-chave: dc.subjectSilica gel-
Palavras-chave: dc.subject4-amino-5-4(pyridyl)-4H-1,2,4-triazole-3-thiol-
Palavras-chave: dc.subjectCyclic voltammetry-
Palavras-chave: dc.subjectAscorbic acid-
Título: dc.titleSilica Gel Functionalized with 4-Amino-5-(4pyridyl)-4H-1,2,4-triazole-3-thiol and their Use as a Copper Sorbent and Electromediator for Voltammetric Detection of Ascorbic Acid-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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