Electrochemical behavior and voltammetric determination of vanillin based on an acetylene black paste electrode modified with graphene-polyvinylpyrrolidone composite film

被引：130

作者：

Deng, Peihong ^{[1
]}

Xu, Zhifeng ^{[1
]}

Zeng, Rongying ^{[1
,2
]}

Ding, Chunxia ^{[3
]}

机构：

[1] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China

[2] Hunan Agr Univ, Coll Resource & Environm, Changsha 410128, Hunan, Peoples R China

[3] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China

来源：

FOOD CHEMISTRY | 2015年 / 180卷

基金：

中国国家自然科学基金;

关键词：

Graphene-polyvinylpyrrolidone composite film; Electrochemical sensor; Vanillin; Electrochemical behavior; Voltammetric determination; SENSOR; ADSORPTION; EXTRACTION; OXIDATION;

D O I：

10.1016/j.foodchem.2015.02.035

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The graphene-polyvinylpyrrolidone composite film modified acetylene black paste electrode (GR-PVP/ABPE) was fabricated and used to determine vanillin. In 0.1 M H3PO4 solution, the oxidation peak current of vanillin increased significantly at GR-PVP/ABPE compared with bare ABPE, PVP/ABPE and GR/ABPE. The oxidation mechanism was discussed. The experimental conditions that exert influence on the voltammetric determination of vanillin, such as supporting electrolytes, pH values, accumulation potential and accumulation time, were optimized. Besides, the interference, repeatability, reproducibility and stability measurements were also evaluated. Under the optimal experimental conditions, the oxidation peak current was proportional to vanillin concentration in the range of 0.02-2.0 mu M, 2.0-40 mu M and 40-100 mu M. The detection limit was 10 nM. This sensor was used successfully for vanillin determination in various food samples. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：156 / 163

页数：8

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