Novel 8,9-dihydroxy-7-methyl-12H-benzothiazolo[2,3-b]quinazolin-1 2-one multiwalled carbon nanotubes paste electrode for simultaneous determination of ascorbic acid, acetaminophen and tryptophan

The electrooxidation of ascorbic acid (AA), acetaminophen (AC), tryptophan (Trp), and their mixture has been studied using an 8,9-dihydroxy-7-methyl-12H-benzothiazolo[2,3-b]quinazolin-1 2-one modified carbon nanotubes paste electrode and cyclic voltammetry, chronoamperometry, electrochemical impedan...

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Bibliographic Details
Published in:Analytical methods 2012-09, Vol.4 (10), p.3275-3282
Main Authors: Asnaashariisfahani, Manzarbanou, Karimi-maleh, Hassan, Ahmar, Hamid, Ensafi, Ali A, Fakhari, Ali R, Khalilzadeh, Mohammad A, Karimi, Fatemeh
Format: Article
Language:English
Subjects:
Anodizing
Ascorbic acid
Electrodes
Mathematical analysis
Multi wall carbon nanotubes
Pastes
Tryptophan
Voltammetry
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Summary:The electrooxidation of ascorbic acid (AA), acetaminophen (AC), tryptophan (Trp), and their mixture has been studied using an 8,9-dihydroxy-7-methyl-12H-benzothiazolo[2,3-b]quinazolin-1 2-one modified carbon nanotubes paste electrode and cyclic voltammetry, chronoamperometry, electrochemical impedance spectroscopy and square wave voltammetry methods. The sensor exhibited potent and persistent electron mediating behavior followed by well separated oxidation peaks towards AA, AC and Trp with activation overpotential. The linear response range for AA, AC and Trp were 0.07-350, 3.0-600, and 10.0-700 mu M, respectively. The modified electrode was used for the determination of these compounds in biological and pharmaceutical samples.
ISSN:1759-9660
1759-9679
DOI:10.1039/c2ay25418b