Electropolymerized Eugenol-MWNT-Based Electrode for Voltammetric Evaluation of Wine Antioxidant Capacity

被引：14
|
作者：
Ziyatdinova, Guzel [1 ]
Kozlova, Ekaterina [1 ]
Budnikov, Herman [1 ]
机构：
[1] Kazan Fed Univ, AM Butlerov Inst Chem, Dept Analyt Chem, Kazan 420008, Russia
来源：
ELECTROANALYSIS | 2015年 / 27卷 / 07期
关键词：
Voltammetry; Electropolymerization; Polyeugenol; Nanotubes; Antioxidants; Food analysis; IN-VITRO; POLYANILINE; POLYPYRROLE; POLYTHIOPHENE; FILMS; RED;
D O I：
10.1002/elan.201400712
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Eugenol electropolymerization conditions on multiwalled carbon nanotube based glassy carbon electrode (MWNT/GCE) have been found. The polyeugenol/MWNT/GCE shows reversible redox steps of o-quinone fragment in acidic media. Natural phenolic antioxidants are oxidized on polyeugenol/MWNT/GCE at 0.52V excluding resveratrol (0.62V). Differential pulse voltammetry on polyeugenol/MWNT/GCE was applied for the evaluation of wine antioxidant capacity (AOC). The AOC was expressed in catechin equivalents per 1L of wine. The linear dynamic range is 1.00-250 mu M with LOD and LOQ of 0.21 and 0.71 mu M of catechin, respectively. Positive correlations for AOC with antioxidant activity (r=0.9840) and total phenolics content (r=0.9944) were observed.
引用
收藏
页码：1660 / 1668
页数：9
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