title: Electrochemical behavior and voltammetric determination of vanillin based on an acetylene black paste electrode modified with graphene-polyvinylpyrrolidone composite film.
abstract: The graphene-polyvinylpyrrolidone composite film modified acetylene black paste electrode (GR-PVP/ABPE) was fabricated and used to determine vanillin. In 0.1M 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 μM, 2.0-40 μM and 40-100 μM. The detection limit was 10nM. This sensor was used successfully for vanillin determination in various food samples.
authors.affiliation: Department of Chemistry and Material Science, Hengyang Normal University, Hengyang 421008, PR China. Electronic address: dph1975@163.com.
authors.forename: Peihong
authors.initials: P
authors.lastname: Deng
authors.affiliation: Department of Chemistry and Material Science, Hengyang Normal University, Hengyang 421008, PR China.
authors.forename: Zhifeng
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Department of Chemistry and Material Science, Hengyang Normal University, Hengyang 421008, PR China; College of Resource and Environment, Hunan Agricultural University, Changsha 410128, PR China.
authors.forename: Rongying
authors.initials: R
authors.lastname: Zeng
authors.affiliation: College of Science, Hunan Agricultural University, Changsha 410128, PR China.
authors.forename: Chunxia
authors.initials: C
authors.lastname: Ding
mesh_terms: D000114:Acetylene / Q000737:chemistry*; D001547:Benzaldehydes / Q000737:chemistry*; D002244:Carbon; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D010084:Oxidation-Reduction
chemical_list: D001547:Benzaldehydes; D002244:Carbon; C100058:vanillin; D000114:Acetylene
keywords: Electrochemical behavior; Electrochemical sensor; Graphene–polyvinylpyrrolidone composite film; Vanillin; Voltammetric determination