A voltammetric sensor based on reduced graphene oxide-hemin-Ag nanocomposites for sensitive determination of tyrosine. Issue 47 (28th July 2020)

• Record Type: Journal Article
• Authors: Zou, Hui-Yu; Lu, Xin-Yang; Kong, Fen-Ying; Wang, Zhong-Xia; Li, Heng-Ye; Fang, Hai-Lin; Wang, Wei
• Is Part Of: RSC advances. Volume 10:Issue 47(2020)
• Page Start: 28026
• Page End: 28031
• Publication Date: 2020-07-28
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra04976j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A novel electrochemical sensor for the sensitive determination of l -Tyr was designed with a rGO-H-Ag nanocomposite modified electrode. Abstract : A novel voltammetric sensor was designed and used for the determination of l -tyrosine (l -Tyr) by surface modification of a glassy carbon electrode with reduced graphene oxide-hemin-Ag (rGO-H-Ag) nanocomposites. The nanocomposites were synthesized by a facile one-pot hydrothermal method and characterized by means of transmission electron microscopy and Raman spectroscopy. The determination of l -Tyr was investigated by cyclic voltammetry and further quantified using differential pulse voltammetry. The results revealed a significant enhanced electrochemical oxidation effect for l -Tyr at the nanocomposites modified electrode. Two linear ranges from 0.1 to 100 μM and 100 to 1000 μM as well as a low detection limit of 30 nM (S/N = 3) were obtained. In addition, the sensor also demonstrated good selectivity, reproducibility and stability.