NDLI: Highly sensitive determination of Sunset Yellow in drink using a poly (l-cysteine) modified glassy carbon electrode

Content Provider	Royal Society of Chemistry (RSC)
Author	Wu, Junjun Ye, Baoxian Wang, Wenjing Luo, Peili Zhang, Kai
Copyright Year	2013
Abstract	A voltammetric sensor for Sunset Yellow was fabricated by polymerizing L-cysteine on the surface of a glassy carbon electrode. The modified electrode was characterized by cyclic voltammetry and electrochemical impedance spectroscopy. The electrochemical behavior and kinetic parameters of Sunset Yellow in phosphate buffer solution (pH 6.6) were investigated by cyclic voltammetry and chronocoulometry using the proposed sensor, and results showed that the electrochemical response of Sunset Yellow was significantly improved. The peak current (differential pulse voltammetry) of Sunset Yellow linearly increased with the concentrations in the range of 8.0 × 10−9–7.0 × 10−7 mol L−1, and the minimum detectable concentration of Sunset Yellow was estimated to be 4.0 × 10−9 mol L−1. Moreover, the linear relationship between the peak current and the concentration of Sunset Yellow in the presence of Lemon Yellow was 1.0 × 10−8–5.0 × 10−7 mol L−1, with a minimum detectable concentration of 6.0 × 10−9 mol L−1. The reported electrochemical sensor was excellent for the determination of Sunset Yellow because of merits such as extreme simplicity, low cost, high sensitivity, good stability and reproducibility.
Starting Page	5044
Ending Page	5050
Page Count	7
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	5
Issue Number	19
Journal	Analytical Methods
DOI	10.1039/c3ay40873f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Sunset Yellow Spectroscopy Cysteine Electrode Buffer solution Carbon Cyclic voltammetry Lemon Yellow Phosphate Electrochemistry PH Sunset Yellow FCF Differential pulse voltammetry Electrical impedance
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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