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Determination of 2,...
Determination of 2,4-diaminotoluene by a bionanocomposite modified glassy carbon electrode
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Ghaani, M. (författare)
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Rovera, C. (författare)
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Pucillo, F. (författare)
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Ghaani, M. R. (författare)
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- Olsson, Richard T. (författare)
- KTH,Polymera material
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Scampicchio, M. (författare)
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Farris, S. (författare)
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(creator_code:org_t)
- Elsevier B.V. 2018
- 2018
- Engelska.
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Ingår i: Sensors and actuators. B, Chemical. - : Elsevier B.V.. - 0925-4005 .- 1873-3077. ; 277, s. 477-483
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- 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
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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