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Determination of 2,4-diaminotoluene by a bionanocomposite modified glassy carbon electrode
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2018 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 277, p. 477-483Article in journal (Refereed) Published
Abstract [en]

This work describes the development of a modified glassy carbon electrode (GCE) for the selective determination of 2,4-diaminotoluene (TDA), a primary aromatic amines (PAAs) that can be formed in food packaging materials including aromatic polyurethane (PU) adhesives. The electrode's surface was modified with multi-walled carbon nanotubes (MWCNTs), MWCNTs in chitosan (CS), and gold nanoparticles (AuNPs). The highest current response was achieved with AuNPs/MWCNTs-CS/GC electrodes, which exhibited an oxidation peak of 9.87 μA by cyclic voltammetry (CV), compared with 1.39 μA of the bare GCE. A detection limit of 35 nM was estimated by amperometry experiments. The oxidation of TDA was strongly dependent on the pH of the medium, having maximum sensitivity at pH ∼ 7. From a mechanistic point of view, the diffusion coefficient of TDA (D = 6.47 × 10−4 cm2 s−1) and the number of electrons (n ≈ 2) involved in the catalytic oxidation of TDA at the surface of the AuNPs/MWCNTs-CS/GCE were determined. The practical utility of this nanocomposite modified electrode was demonstrated by migration studies from conventional food packaging materials. 

Place, publisher, year, edition, pages
Elsevier B.V. , 2018. Vol. 277, p. 477-483
Keywords [en]
2, 4-Diaminotoluene (TDA), Chitosan, Electrochemical nanosensor electrode, Gold nanoparticle, Multi-walled carbon nanotube, Primary aromatic amine, Adhesives, Amines, Aromatic compounds, Aromatization, Catalytic oxidation, Cyclic voltammetry, Glass, Gold nanoparticles, Metal nanoparticles, Multiwalled carbon nanotubes (MWCN), Oxidation, Packaging machines, Packaging materials, Yarn, Food-packaging materials, Maximum sensitivity, Modified electrodes, Modified glassy carbon electrode, Number of electrons, Primary aromatic amines, Selective determination, Glass membrane electrodes
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Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-236544DOI: 10.1016/j.snb.2018.09.053ISI: 000453066700061Scopus ID: 2-s2.0-85053474908OAI: oai:DiVA.org:kth-236544DiVA, id: diva2:1266163
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QC 20181127

Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2019-05-20Bibliographically approved

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Olsson, Richard T.

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