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- Title
Direct electrochemistry and electrocatalysis of nitrite based on nano-alumina-modified electrode.
- Authors
Qiong He; Tian Gan; Dongyun Zheng; ShengShui Hu
- 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.
- Subjects
ELECTROCHEMISTRY; ELECTROCATALYSIS; NITRITES; CARBON electrodes; ALUMINUM oxide; HYDROGEN-ion concentration; MATHEMATICAL optimization
- Publication
Journal of Solid State Electrochemistry, 2010, Vol 14, Issue 6, p1057
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-009-0915-1