Detection of ascorbic acid by a nickel-manganese oxide composite electrochemical sensor

被引：0
|
作者：
Han C. [1 ]
Yue Z. [1 ]
Yu S. [1 ]
Wang X. [1 ]
Li C. [1 ]
Zhang S. [1 ]
机构：
[1] College of Food Engineering, Harbin University of Commerce, Heilongjiang, Harbin
来源：
Jingxi Huagong/Fine Chemicals | 2024年 / 41卷 / 05期
关键词：
ascorbic acid; composite materials; electrochemical sensors; functional mateials; nickel manganese oxide;
D O I：
10.13550/j.jxhg.20230377
中图分类号：
学科分类号：
摘要：
Nickel manganese oxide composite (Mn-Ni-Oxide), prepared by one-step hydrothermal method and characterized by XRD, SEM, EDS and FTIR, was used to modify glassy carbon electrode by drop-coating method to construct an electrochemical sensor for rapid detection of ascorbic acid. The electrochemical behavior of ascorbic acid on the Mn-Ni-Oxide modified electrode was analyzed by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results showed that the outer surface of Mn-Ni-Oxide was a porous nanosphere with the main components of Mn2O3 and NiMnO3. When the acetic acid/sodium acetate buffer solution was at pH=4 and the modification amount of Mn-Ni-Oxide for the modified electrode was 10 μL, the concentration (c) of ascorbic acid was linearly related to the value of oxidation peak current (Ip) in the range of 0.1~9000 μmol/L, with the linear equation of Ip=3.2435c+17.198 (R2=0.9920), the detection limit of 0.025 μmol/L, and the sensitivity of 3.2435 μA·m·L/(mol·cm). When applied to the determination of ascorbic acid in fruit juice, the sensor showed recoveries of spiked standards ranging from 95.5% to 103.1%, demonstrating its good prospects for application in food analysis. © 2024 Fine Chemicals. All rights reserved.
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页码：1022 / 1029and1035
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