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Electrochemical oxidation behavior of nitrite on a chitosan-carboxylated multiwall carbon nanotube modified electrode
Institution:1. College of Chemistry, Central China Normal University, Wuhan 430079, People’s Republic of China;2. Department of Chemistry, Chizhou Teachers College, Guichi 247000, People’s Republic of China;3. Department of Chemistry, Dezhou College, Dezhou 253023, People’s Republic of China;1. Pontificia Universidad Católica de Chile, Chemistry Faculty, Vicuña Mackenna 4860, Santiago 7820436, Chile;2. Pontificia Universidad Católica de Chile, Biological Sciences Faculty, Avda, Libertador Bernardo OHiggins 340, Santiago 8331150, Chile;1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210000, PR China;2. Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry & Chemical Engineering, Huaiyin Normal University, Huaian, 223300, PR China;1. Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Faculty of Applied Sciences, MARA University of Technology (UiTM), 40450 Selangor, Malaysia;3. Chemical Engineering Department, The Petroleum Institute, Abu Dhabi, UAE;4. Department of Chemistry, Faculty of Science, University Putra Malaysia (UPM), 43400 Serdang, Malaysia;1. College of Science and Sustainability, School of Health, Medical and Applied Sciences, Central Queensland University, Rockhampton North, QLD, 4702, Australia;2. Coastal Marine Ecosystems Research Centre, Central Queensland University, Gladstone Marina Campus, Bryan Jordan Drive, Gladstone, QLD, 4680, Australia
Abstract:A novel chitosan-carboxylated multiwall carbon nanotube modified glassy carbon electrode (MC/GCE) was developed to investigate the oxidation behavior of nitrite using cyclic voltammetry and differential pulse voltammetry modes. The electrochemical mechanism of the MC/GCE towards nitrite was discussed. The MC/GCE exhibited fast response towards nitrite with a detection limit of 1 × 10?7 mol l?1 and a linear range of 5 × 10?7–1 × 10?4 mol l?1. The possible interference from several common ions was tested. The proposed method was successfully applied in the detection of nitrite in real samples.
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