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Determination of 2,4-diaminotoluene by a bionanocomposite modified glassy carbon electrode

Ghaani, M. (författare)
Rovera, C. (författare)
Pucillo, F. (författare)
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Ghaani, M. R. (författare)
Olsson, Richard T. (författare)
KTH,Polymera material
Scampicchio, M. (författare)
Farris, S. (författare)
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 (creator_code:org_t)
Elsevier B.V. 2018
2018
Engelska.
Ingår i: Sensors and actuators. B, Chemical. - : Elsevier B.V.. - 0925-4005 .- 1873-3077. ; 277, s. 477-483
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • 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

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