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Sensors 2017, 17(3), 545; doi:10.3390/s17030545

A Zinc Oxide Nanoflower-Based Electrochemical Sensor for Trace Detection of Sunset Yellow

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1
Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
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Quality Inspection and Test Center for Sugarcane and Its Product, China Ministry of Agriculture (Nanning), Nanning 530007, China
*
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 20 January 2017 / Revised: 6 March 2017 / Accepted: 6 March 2017 / Published: 8 March 2017
(This article belongs to the Section Chemical Sensors)
View Full-Text   |   Download PDF [5289 KB, uploaded 9 March 2017]   |  

Abstract

Zinc oxide nanoflower (ZnONF) was synthesized by a simple process and was used to construct a highly sensitive electrochemical sensor for the detection of sunset yellow (SY). Due to the large surface area and high accumulation efficiency of ZnONF, the ZnONF-modified carbon paste electrode (ZnONF/CPE) showed a strong enhancement effect on the electrochemical oxidation of SY. The electrochemical behaviors of SY were investigated using voltammetry with the ZnONF-based sensor. The optimized parameters included the amount of ZnONF, the accumulation time, and the pH value. Under optimal conditions, the oxidation peak current was linearly proportional to SY concentration in the range of 0.50–10 μg/L and 10–70 μg/L, while the detection limit was 0.10 μg/L (signal-to-noise ratio = 3). The proposed method was used to determine the amount of SY in soft drinks with recoveries of 97.5%–103%, and the results were in good agreement with the results obtained by high-performance liquid chromatography. View Full-Text
Keywords: zinc oxide nanoflower; sunset yellow; electrochemical sensor; trace detection zinc oxide nanoflower; sunset yellow; electrochemical sensor; trace detection
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Ya, Y.; Jiang, C.; Li, T.; Liao, J.; Fan, Y.; Wei, Y.; Yan, F.; Xie, L. A Zinc Oxide Nanoflower-Based Electrochemical Sensor for Trace Detection of Sunset Yellow. Sensors 2017, 17, 545.

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