Detalhes bibliográficos
| Resumo: | Gold nanoparticles dispersed in an ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate (Au-BMI.PF6) and a binuclear nickel(II) complex ([Ni2(HBPPAMFF)μ-(OAc)2(H2O)]BPh4) immobilized on functionalized silica were successfully applied in the construction of a novel sensor for the determination of fisetin by square-wave voltammetry. Under optimized conditions, the analytical curve showed two linear ranges for fisetin concentrations from 0.28 to 1.39 μM and 2.77 to 19.50 μM with a detection limit of 0.05 μM. This sensor demonstrated suitable stability (ca. 150 days; at least 500 determinations) and good repeatability and reproducibility, with relative standard deviations of 2.91 and 5.11%, respectively. The recovery study of fisetin in apple juice samples gave values from 96.4 to 106.4%. The efficient analytical performance of the proposed sensor can be attributed to the effective immobilization of the NiIINiII complex on silica and the Au-BMI.PF6 contribution to the electrode response. |
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| Autores principais: | Brondani, Daniela |
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| Outros Autores: | Vieira, Iolanda Cruz; Piovezan, Clovis; Silva, Jaqueline Maria Ramos da; Neves, Ademir; Dupont, Jairton; Scheeren, Carla Weber |
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| Assunto: | Gold nanoparticles Silica |
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| Ano: | 2013 |
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| País: | Brasil |
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| Tipo de documento: | artigo |
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| Tipo de acesso: | acesso aberto |
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| Instituição associada: | IBICT |
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| Idioma: | inglês |
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| Origem: | Oasisbr |
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