Citation: ZHOU Chen-Yu, FANG Qi, ZHANG Yu, DU Yan. Visualized Detection of Ascorbic Acid by Oxidase Mimics Based on Au@Pt Nanoparticles and Amphiphilic Aerogel[J]. Chinese Journal of Analytical Chemistry, ;2021, 49(6): 982-991. doi: 10.19756/j.issn.0253-3820.211155 shu

Visualized Detection of Ascorbic Acid by Oxidase Mimics Based on Au@Pt Nanoparticles and Amphiphilic Aerogel

ZHOU Chen-Yu ^1,2 ,
FANG Qi ^1,2 ,
ZHANG Yu ^1,2,, ,
DU Yan ^1,2,,

1.
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2.
School of Applied Chemistry and Engineering, University of Science & Technology of China, Hefei 230026, China

Corresponding author: ZHANG Yu, DU Yan,
Received Date: 1 March 2021
Revised Date: 25 March 2021

Fund Project: Supported by the National Natural Science Foundation of China(Nos.21874129, 31960506) and the Department of Science and Technology of Jilin Province, China (No.20200801044GH).

Au@Pt nanoparticles were grown in-situ on an amphiphilic polyvinyl alcohol aerogel (PAA) surface by a hydrothermal method to prepare an oxidase mimic (Au@Pt-PAAC) and was further applied to the visual detection of ascorbic acid. The abundant oxygen-containing functional groups on the PAA carrier provided nucleation sites for the growth of nanoparticles. Also, the core-shell structure of Au@Pt nanoparticles improved the oxidase-like activity of the material due to the synergistic effect and reduced the dosage of platinum, thus helping with cost control. Based on the oxidase-like activity of Au@Pt-PAAC material, a colorimetric sensor for the visual detection of ascorbic acid was constructed. Under the optimized experimental conditions, the linear range for the detection of ascorbic acid was 10-100 μmol/L, and the detection limit was 8.77 μmol/L. The sensor was also employed to evaluate the total antioxidant capacity of beverages and vitamin C tablets, with the experiments showing consistent results with the content of the ingredients in the sample instructions. The method established here is simple and visualized, with good anti-interference ability, and can be used to efficiently detect antioxidants.
- Au@Pt nanoparticles,
- Oxidase,
- Amphiphilic aerogel,
- Colorimetric analysis,
- Ascorbic acid,
- Total antioxidant capacity
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