Colorimetric Method Based on CeO2/CoOOH Nanozyme for Rapid Detection of Ascorbic Acid in Fruits

被引：0
作者：
Yue, Xiaoyue [1 ,2 ,3 ]
Wu, Chaoyun [1 ]
Yan, Shuliang [1 ]
Fu, Long [1 ]
Zhao, Dianbo [1 ,2 ,3 ]
机构：
[1] College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou
[2] Key Laboratory of Cold Chain Food Processing and Safety Control, Ministry of Education, Zhengzhou
[3] Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou
来源：
Shipin Kexue/Food Science | 2024年 / 45卷 / 24期
关键词：
ascorbic acid; colorimetric method; nanozyme; rapid detection;
D O I：
10.7506/spkx1002-6630-20240510-074
中图分类号：
学科分类号：
摘要：
In this study, cerium dioxide-modified cobalt oxyhydroxide (CeO2/CoOOH) nanomaterial was synthesized by a liquid-phase precipitation method. CeO2/CoOOH showed good oxidase-like activity toward 3,3’,5,5’-tetramethylbenzidine (TMB), and could directly oxidize TMB to ox-TMB, which presented a clear blue color. Reversely, ascorbic acid (AA) could reduce ox-TMB to TMB, leading to a decrease in the absorbance of ox-TMB at 652 nm and a fading of the blue color. Based on this phenomenon, a new colorimetric sensor for AA detection was developed. The sensor exhibited a highly sensitive response to AA with a limit of detection (LOD) of 2.73 μg/mL and a wide detection range of 5-100 μg/mL and could be successfully applied for rapid detection of AA in oranges and apples. © 2024 Chinese Chamber of Commerce. All rights reserved.
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页码：250 / 258
页数：8
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