Amperometric Determination of Maltol using a Cobalt Oxide-Assembled MCM-41 Composite-Modified Glassy Carbon Electrode |
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| Authors: | Honghong Rao Yaya Ma Zhonghua Xue Xinzhen Du Guohu Zhao Shenyin Li |
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| Institution: | 1. College of Chemistry &2. Environmental Engineering, Lanzhou City University, Lanzhou, P. R. Chinaraohonghong@gmail.com rhh@nwnu.edu.cn;4. Environmental Engineering, Lanzhou City University, Lanzhou, P. R. China;5. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, P. R. China |
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| Abstract: | A sensitive and selective amperometric method for maltol is reported based on a nanostructural Co3O4-assembled Mobil composite material (MCM-41). The amperometric sensor was characterized by scanning electron microscopy, energy-dispersive X-ray spectrometry, cyclic voltammetry, electrochemical impedance spectroscopy, and ultraviolet–visible absorption spectroscopy. The obtained calibration curve showed that the oxidative peaks increased linearly with the maltol concentration from 1.66?×?10?6?M to 1.15?×?10?4?M with a detection limit of 0.42?µM. Furthermore, the mechanism of oxidation of the analyte on the modified electrode surface was investigated using electrochemical techniques. The modified electrode was used for the determination of maltol using the method of standard addition with satisfactory results. |
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| Keywords: | Amperometric sensor Co3O4 assembled MCM-41 composite maltol mesoporous silica |
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