Electrochemical Behavior of Caffeic Acid Assayed with Gold Nanoparticles/Graphene Nanosheets Modified Glassy Carbon Electrode. Issue 5 (22nd February 2013)

• Record Type: Journal Article
• Authors: Zhang, Yanli; Liu, Yanpei; He, Jiemei; Pang, Pengfei; Gao, Yuntao; Hu, Qiufen
• Is Part Of: Electroanalysis. Volume 25:Issue 5(2013:May)
• Page Start: 1230
• Page End: 1236
• Publication Date: 2013-02-22
• Subjects: Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201200587
• Languages: English
• ISSNs: 1040-0397

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A gold nanoparticle (AuNP) and graphene nanosheet (GN) modified glassy carbon electrode (GCE) is proposed as voltammetric sensor for caffeic acid assay. The sensor exhibits a surface‐confined and reversible process for oxidation of caffeic acid revealed by cyclic voltammetry. The results show more favorable electron transfer kinetics than the bare GCE. The linear response of the sensor is from 5×10⁻⁷ to 5×10⁻⁵ M with a detection limit of 5×10⁻⁸ M (<italic>S/N</italic>=3). The AuNP/GN nanocomposite shows more favorable electrochemical activity and should be a kind of more robust and advanced functional material, which provides a promising platform for electrochemical sensors and biosensors. The method was successfully applied to detect caffeic acid in pharmaceutical tablets with satisfactory results.</p> </abstract>