Your browser doesn't support javascript.
loading
A carbon nanotube/poly [Ni-(Protoporphyrin IX)] composite for amperometric detection of long chain aliphatic amines.
Carballo, Romina; Rinaldi, Ana L; Dabas, Paula C; Rezzano, Irene N.
Afiliação
  • Carballo R; IQUIFIB, National Research Council (CONICET), Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Junin 956, CP 1113 Buenos Aires, Argentina.
  • Rinaldi AL; IQUIFIB, National Research Council (CONICET), Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Junin 956, CP 1113 Buenos Aires, Argentina.
  • Dabas PC; IQUIFIB, National Research Council (CONICET), Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Junin 956, CP 1113 Buenos Aires, Argentina.
  • Rezzano IN; IQUIFIB, National Research Council (CONICET), Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Junin 956, CP 1113 Buenos Aires, Argentina. Electronic address: irezzano@ffyb.uba.ar.
Bioelectrochemistry ; 104: 51-7, 2015 Aug.
Article em En | MEDLINE | ID: mdl-25827578
Poly [Ni-Protoporphyrin] film (pNiPP), containing multiwall carbon nanotubes (MWCNT) was used to cover a glassy carbon electrode. The hybrid material (pNiPP/MWCNT) successfully combines the permselectivity of pNiPP with the high conductivity of MWCNT. The modified electrode was used to perform amperometric detection of long chain aliphatic amines (LCAA) in order to prevent the passivation effect of the aliphatic chain. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) demonstrated that the pNiPP/MWCNT facilitates the electron transfer reaction. The charge transfer resistance (Rct) values were significantly lower by up to one order of magnitude compared to the bare electrode. Differential pulse polarography (DPP) showed a marked decrease of the overpotential generated by the aliphatic chain. The calibration of the amperometric peak area vs. concentrations of derivatized LCAA exhibits a linear response within the range of 0.018 and 28 µM and correlation coefficient (R(2)) higher than 0.999 (n=5). The quantitation limit of the pNiPP/MWCNT electrode is about 400 times lower than the UV-visible detection. RSD of 7.2%, 5.8%, 2.5% and 2.3% was obtained for concentrations of 0.028, 0.28, 2.8 and 28 µM of ferrocenyl octadecylamine. A solution of sphingosine, 0.23 µM, was exclusively detected with HPLC-ECD with pNiPP/MWCNT electrode.
Assuntos
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Protoporfirinas / Nanotubos de Carbono / Nanocompostos / Aminas / Metaloporfirinas / Níquel Tipo de estudo: Diagnostic_studies Idioma: En Revista: Bioelectrochemistry Assunto da revista: BIOQUIMICA Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Argentina País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Protoporfirinas / Nanotubos de Carbono / Nanocompostos / Aminas / Metaloporfirinas / Níquel Tipo de estudo: Diagnostic_studies Idioma: En Revista: Bioelectrochemistry Assunto da revista: BIOQUIMICA Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Argentina País de publicação: Holanda