Sensor for fisetin based on gold nanoparticles in ionic liquid and binuclear nickel complex immobilized in silica
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 determinatio...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2010 |
| País: | Brasil |
| Institución: | Universidade Federal do Rio Grande (FURG) |
| Repositorio: | Repositório Institucional da FURG (RI FURG) |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.furg.br:1/3825 |
| Acceso en línea: | http://repositorio.furg.br/handle/1/3825 |
| Access Level: | acceso abierto |
| Palabra clave: | Gold nanoparticles Silica |
| Sumario: | 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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