Methylparaben quantification via electrochemical sensor based on reduced graphene oxide decorated with ruthenium nanoparticles

Autor(es)

Mendonca, Camila D. ; Prado, Thiago M. ; Cincotto, Fernando H. ; Verbinnen, Raphael T. ; Machado, Sergio A. S.

• Tipo de documento: Artigo Científico
• Fonte: SENSORS AND ACTUATORS B-CHEMICAL; v. 251, p. 739-745, NOV 2017.
• Citações Web of Science: 6

Resumo

MePa quantification was performed through an electroanalytical method, in which the presence of rGO/RuNPs on GCE surface allowed the increase of the charge transfer rate in the oxidation process of the target molecule. The characterization of the composite material was carried out by TEM, in which the presence of RuNPs with an average diameter of 3.1 +/- 0.5 nm dispersed on the surface of rGO was observed. The electroanalytical method developed showed a linear response range of 5.00 x 10(-7)-3.00 x 10(-6) mol L-1 and LOD of 2.40 x 10(-7) mol L-1. The results were statistically compared with the data obtained by the official method (HPLC) and shown to be equivalent, which allows discussion upon the use of electroanalytical methods of alternative forms of official analysis methods in cosmetic samples. (C) 2017 Elsevier B. V. All rights reserved. (AU)

• Processo FAPESP: 16/16565-5 - Desenvolvimento de métodos ultrassensíveis para a detecção de RNA visando o diagnóstico de Câncer de Cabeça e Pescoço
• Beneficiário: Fernando Henrique Cincotto
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/06139-9 - Desenvolvimento de um sensor foto-eletroquímico nanoestruturado para o monitoramento de p-nitrofenol em águas de abastecimento
• Beneficiário: Camila Domingues Mendonça Verbinnen
• Linha de fomento: Bolsas no Brasil - Doutorado