Sensor for fisetin based on gold nanoparticles in ionic liquid and binuclear nickel complex immobilized in silica

被引：21

作者：

Brondani, Daniela ^{[1
]}

Vieira, Iolanda Cruz ^{[1
]}

Piovezan, Clovis ^{[2
]}

Ramos da Silva, Jaqueline Maria ^{[2
]}

Neves, Ademir ^{[2
]}

Dupont, Jairton ^{[3
]}

Scheeren, Carla Weber ^{[3
]}

机构：

[1] Univ Fed Santa Catarina, Lab Biosensors, Dept Chem, BR-88040900 Florianopolis, SC, Brazil

[2] Univ Fed Santa Catarina, Lab Bioinorgan & Crystallog, Dept Chem, BR-88040900 Florianopolis, SC, Brazil

[3] Univ Fed Rio Grande do Sul, Lab Mol Catalysis, Inst Chem, BR-91501970 Porto Alegre, RS, Brazil

来源：

ANALYST | 2010年 / 135卷 / 05期

关键词：

PLANT FLAVONOID FISETIN; CARBON-PASTE ELECTRODE; CELL-CYCLE ARREST; VOLTAMMETRIC DETERMINATION; PHENOLIC-COMPOUNDS; GEL; BIOSENSOR; SURFACE; LACCASE; OXIDATION;

D O I：

10.1039/b925533h

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Gold nanoparticles dispersed in an ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate (Au-BMI.PF(6)) and a binuclear nickel(II) complex ([Ni(2)(HBPPAMFF)mu-(OAc)(2)(H(2)O)]BPh(4)) 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 mM and 2.77 to 19.50 mM with a detection limit of 0.05 mM. 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 Ni(II)Ni(II) complex on silica and the Au-BMI.PF(6) contribution to the electrode response.

引用

页码：1015 / 1022

页数：8

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