Abstract
In this paper, an electrochemical sensor for sensitive and convenient determination of salicylic acid (SA) was constructed using well-aligned multiwalled carbon nanotubes as electrode material. Compared to the glassy carbon electrode, the electro-oxidation of SA significantly enhanced at the multiwalled carbon nanotube (MWCNT) electrode. The MWCNT electrode shows a sensitivity of 59.25 μA mM−1, a low detection limit of 0.8 × 10−6 M and a good response linear range with SA concentration from 2.0 × 10−6 to 3.0 × 10−3 M. In addition, acetylsalicylic acid was determined indirectly after hydrolysis to SA and acetic acid, which simplified the detection process. The mechanism of electrochemical oxidation of SA at the MWCNT electrode is also discussed.
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Financial support from the National Natural Science Foundation of China (No. 20773041), the Research Fund for the Doctoral Program of Higher Education (No. 20070561008), and the Ministry of Science and Technology of China (No. 2008AA06Z311) is greatly appreciated.
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Zhang, WD., Xu, B., Hong, YX. et al. Electrochemical oxidation of salicylic acid at well-aligned multiwalled carbon nanotube electrode and its detection. J Solid State Electrochem 14, 1713–1718 (2010). https://doi.org/10.1007/s10008-010-1014-z
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DOI: https://doi.org/10.1007/s10008-010-1014-z