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Wang J, Shan X, Xue Q, Liu Y, Liu Z, He L, Wang X, Zhu C. Detection of nitrite in water using Glycine-modified nanocarbon and Au nanoparticles co-modified flexible laser-induced graphene electrode. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Liu C, Chen D, Zhu C, Liu X, Wang Y, Lu Y, Zheng D, Fu B. Fabrication of a Disposable Amperometric Sensor for the Determination of Nitrite in Food. MICROMACHINES 2023; 14:687. [PMID: 36985095 PMCID: PMC10056392 DOI: 10.3390/mi14030687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/15/2023] [Accepted: 03/17/2023] [Indexed: 06/18/2023]
Abstract
Silver nanoparticles (AgNPs) were synthesized through an environmentally friendly method with tea extract as a reduction agent. By immobilizing them on the surface of a low-cost pencil graphite electrode (PGE) with the aid of a simple and well-controlled in-situ electropolymerization method, a novel nanosensing interface for nitrite was constructed. The film-modified PGE showed good electrocatalytic effects on the oxidation of nitrite and was characterized through scanning electron microscopy, X-ray photoelectron spectroscopy, and electrochemical techniques. Characterization results clearly show that the successful modification of AgNPs improved the surface area and conductivity of PGEs, which is beneficial to the high sensitivity and short response time of the nitrite sensor. Under the optimal detection conditions, the oxidation peak current of nitrite had a good linear relationship with its concentration in the range of 0.02-1160 μmol/L with a detection limit of 4 nmol/L and a response time of 2 s. Moreover, the sensor had high sensitivity, a wide linear range, a good anti-interference capability, and stability and reproducibility. Additionally, it can be used for the determination of nitrite in food.
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Affiliation(s)
- Chao Liu
- College of Biomedical Engineering, South-Central Minzu University, Wuhan 430074, China
- Hubei Key Laboratory of Medical Information Analysis & Tumor Diagnosis and Treatment, Wuhan 430074, China
- Key Laboratory of Cognitive Science, State Ethnic Affairs Commission, Wuhan 430074, China
| | - Daoming Chen
- College of Biomedical Engineering, South-Central Minzu University, Wuhan 430074, China
- Hubei Key Laboratory of Medical Information Analysis & Tumor Diagnosis and Treatment, Wuhan 430074, China
- Key Laboratory of Cognitive Science, State Ethnic Affairs Commission, Wuhan 430074, China
| | - Chunnan Zhu
- College of Biomedical Engineering, South-Central Minzu University, Wuhan 430074, China
- Hubei Key Laboratory of Medical Information Analysis & Tumor Diagnosis and Treatment, Wuhan 430074, China
- Key Laboratory of Cognitive Science, State Ethnic Affairs Commission, Wuhan 430074, China
| | - Xiaojun Liu
- College of Biomedical Engineering, South-Central Minzu University, Wuhan 430074, China
- Hubei Key Laboratory of Medical Information Analysis & Tumor Diagnosis and Treatment, Wuhan 430074, China
- Key Laboratory of Cognitive Science, State Ethnic Affairs Commission, Wuhan 430074, China
| | - Yu Wang
- Wuhan Institute for Food and Cosmetic Control, Wuhan 430040, China
- Key Laboratory of Edible Oil Quality and Safety for State Market Regulation, Wuhan 430040, China
| | - Yuepeng Lu
- Wuhan Institute for Food and Cosmetic Control, Wuhan 430040, China
- Key Laboratory of Edible Oil Quality and Safety for State Market Regulation, Wuhan 430040, China
| | - Dongyun Zheng
- College of Biomedical Engineering, South-Central Minzu University, Wuhan 430074, China
- Hubei Key Laboratory of Medical Information Analysis & Tumor Diagnosis and Treatment, Wuhan 430074, China
- Key Laboratory of Cognitive Science, State Ethnic Affairs Commission, Wuhan 430074, China
| | - Baorong Fu
- Wuhan Great Sea Hi-Tech Co., Ltd., Wuhan 430223, China
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