Preparation of Nanoporous Gold-based Electrochemical Sensor for the Detection of Ascorbic Acid in Drinks

doi:10.7506/spkx1002-6630-20200606-093

FOOD SCIENCE ›› 2021, Vol. 42 ›› Issue (20): 274-279.doi: 10.7506/spkx1002-6630-20200606-093

• Safety Detection • Previous Articles Next Articles

Preparation of Nanoporous Gold-based Electrochemical Sensor for the Detection of Ascorbic Acid in Drinks

ZHANG Qiaoyun, CHENG Weiwei, ZHANG Yan, YANG Wenjian, YANG Yuling, TANG Xiaozhi

(1. Collaborative Innovation Center for Modern Grain Circulation and Safety, Key Laboratory of Grains and Oils Quality Control and Processing, College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing 210023, China; 2. Hebei Food Inspection and Research Institute, Shijiazhuang 050091, China)

Online:2021-10-25 Published:2021-11-12

Abstract

Abstract: Nanoporous gold (NPG), with high electrocatalytic activity for the oxidation of ascorbic acid was prepared by acid corrosion and used to construct a NPG-modified glassy carbon electrode (GCE) as an electrochemical sensor to detect ascorbic acid in drinks. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to determine that citrate buffer at pH 4.0 was the best buffer for activating the electrocatalytic activity of NPG. Under optimized conditions, ascorbic acid was detected by DPV. The results showed a good linear relationship between the concentration of ascorbic acid in the range of 6.652 8 to 160 μg/mL and the peak current density. The electrode proved to be easy to prepare and have high sensitivity, good stability and strong interference resistance, indicating great potential for rapid detection of ascorbic acids in drinks.

Key words: ascorbic acid; nanoporous gold; electrochemistry

CLC Number:

TS275.5

ZHANG Qiaoyun, CHENG Weiwei, ZHANG Yan, YANG Wenjian, YANG Yuling, TANG Xiaozhi. Preparation of Nanoporous Gold-based Electrochemical Sensor for the Detection of Ascorbic Acid in Drinks[J]. FOOD SCIENCE, 2021, 42(20): 274-279.

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Preparation of Nanoporous Gold-based Electrochemical Sensor for the Detection of Ascorbic Acid in Drinks

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