期刊
MICROMACHINES
卷 12, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/mi12040351
关键词
diosmin; disposable working electrode; pencil graphite electrode; cyclic voltammetry; differential pulse voltammetry; adsorptive stripping voltammetry; dietary supplements
Diosmin is a naturally occurring flavonoid that can be quantified through a disposable pencil graphite electrode. The oxidative process involves two irreversible steps.
Diosmin (DIO) is a naturally occurring flavonoid with multiple beneficial effects on human health. The presence of different hydroxyl groups in diosmin structure enables its electrochemical investigation and quantification. This work presents, for the first time, diosmin voltammetric behavior and quantification on the cost-effective, disposable pencil graphite electrode (PGE). Diosmin oxidation on PGE involves two irreversible steps, generating products with reversible redox behaviors. All electrode processes are pH-dependent and predominantly adsorption-controlled. Differential pulse (DPV) and adsorptive stripping differential pulse (AdSDPV) voltammetric methods have been optimized for diosmin quantification o an H-type PGE, in 0.100 mol/L H2SO4. The linear ranges and limits of detection were for DPV 1.00 x 10(-6)-1.00 x 10(-5) mol/L and 2.76 x 10(-7) mol/L DIO for DPV and 1.00 x 10(-7)-2.50 x 10(-6) mol/L and 7.42 x 10(-8) mol/L DIO for AdSDPV, respectively. The DPV method was successfully applied for diosmin quantification in dietary supplement tablets. The percentage recovery was 99.87 +/- 4.88%.
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