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Direct electrochemistry and electrocatalysis of nitrite based on nano-alumina-modified electrode

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Abstract

Simple and sensitive electrochemical method for the determination of nitrite, based on a nano-alumina-modified glassy carbon electrode (GCE), is described. Nitrite yields a well-defined oxidation peak whose potential is 0.74 V at the nano-alumina-coated GCE in 0.1 mol L−1 phosphate buffer (pH 5.0). Compared with bare GCE, the nano-alumina-modified GCE has evident catalytic effect towards the oxidation of nitrite, and its peak current can be significantly enhanced. Some of the experimental parameters were optimized for the determination of nitrite. The oxidation peak current was proportional to nitrite concentration in the range of 5.0 × 10−8–1.1 × 10−3 mol L−1, and a detection limit of 1.0 × 10−8 mol L−1 was obtained. This method has been successfully used to the determination of nitrite in sausage sample. Furthermore, results obtained by the method have been compared with spectrophotometric method.

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Acknowledgements

This research is supported by the National Nature Science Foundation of China (Nos. 30770549, 20805035, and 90817103) and the Nature Science Foundation of Education Department of Yunnan Province of China (No. 06Z048A).

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Authors and Affiliations

  1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China

    Tian Gan, Dongyun Zheng & ShengShui Hu

  2. Department of Chemistry, Qu**g Normal College, Qu**g, 655011, China

    Qiong He

  3. State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Bei**g, 100080, China

    Qiong He & ShengShui Hu

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  1. Qiong He
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  2. Tian Gan
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Correspondence to ShengShui Hu.

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He, Q., Gan, T., Zheng, D. et al. Direct electrochemistry and electrocatalysis of nitrite based on nano-alumina-modified electrode. J Solid State Electrochem 14, 1057–1064 (2010). https://doi.org/10.1007/s10008-009-0915-1

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  • DOI: https://doi.org/10.1007/s10008-009-0915-1

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