Amperometric Determination of Maltol using a Cobalt Oxide-Assembled MCM-41 Composite-Modified Glassy Carbon Electrode

A sensitive and selective amperometric method for maltol is reported based on a nanostructural Co 3 O 4 -assembled Mobil composite material (MCM-41). The amperometric sensor was characterized by scanning electron microscopy, energy-dispersive X-ray spectrometry, cyclic voltammetry, electrochemical i...

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Bibliographic Details
Published in:Analytical letters 2017-06, Vol.50 (9), p.1435-1447
Main Authors: Rao, Honghong, Ma, Yaya, Xue, Zhonghua, Du, Xinzhen, Zhao, Guohu, Li, Shenyin
Format: Article
Language:English
Subjects:
Absorption spectroscopy
Amperometric sensor
assembled MCM-41 composite
Cobalt oxides
Composite materials
Electrical measurement
Electrochemical impedance spectroscopy
Electrodes
Glassy carbon
maltol
mesoporous silica
Nanoparticles
Oxidation
Scanning electron microscopy
Spectrometry
Ultraviolet spectroscopy
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Summary:A sensitive and selective amperometric method for maltol is reported based on a nanostructural Co 3 O 4 -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.
ISSN:0003-2719
1532-236X
DOI:10.1080/00032719.2016.1225749