Affiliation:
1. Department of Food Science, Shanghai Business School, Shanghai 200235, P.R. China
Abstract
Background:
Currently, carbon nanomaterials and carbon nanomaterials-based electrodes have illustrated significant electrocatalytic abilities.
Methods:
An electrochemical sensor was developed for vanillin using graphene (GR) decorated
with gold nanoparticles (AuNPs) on a glassy carbon electrode (GCE) with two steps.
AuNPs/GR/GCE, as the electrochemical sensor for determination of vanillin, included dropping
GR onto the electrode and then electrodepositing AuNPs on GR/GCE. The structure and morphology of the synthesized nanocomposites (AuNPs/GR) on the electrode were confirmed by scanning
electron microscopy (SEM).
Results:
Electrochemical studies revealed that modification of the electrode surface with
AuNPs/GR nanocomposites significantly increases the oxidation peak currents of vanillin. The
peak currents in differential pulse voltammetry (DPV) of vanillin increased linearly with their concentration in the range of 5-120 µM. The limit of detection was found to be 1.7 µM for vanillin.
Also, the effect of some interfering compounds, such as NaCl, KCl, glucose, alanine, phenylalanine, glycine, and others, on the determination of vanillin was evaluated, and none of them had a
significant effect on the assay recovery
Conclusions:
A new electrochemical biosensor was fabricated with AuNPs/GR nanocomposites.
The sensor was successfully used to detect vanillin in cookie samples.
Funder
Natural Science Foundation of Shanghai
Publisher
Bentham Science Publishers Ltd.
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献