Tapioca Biofilm Containing Nitrogen-doped Titanium Dioxide Nanoparticles for Electrochemical Detection of 17-beta Estradiol

Autor(es)

Mauruto de Oliveira, Gabriela C. ^[1] ; de Palma, Elisangela P. ^[2] ; Kunita, Marcos H. ^[2] ; Medeiros, Roberta Antigo ^[3] ; de Matos, Roberto ^[3] ; Francisco, Kelly Roberta ^[1] ; Janegitz, Bruno C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Ciencias Nat Matemat & Educ, BR-13600970 Araras, SP - Brazil

^[2] Univ Estadual Maringa, Dept Quim, BR-87020900 Maringa, PR - Brazil

^[3] Univ Estadual Londrina, Dept Quim, BR-86057970 Londrina, PR - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electroanalysis; v. 29, n. 11, p. 2638-2645, NOV 2017.
• Citações Web of Science: 7

Resumo

A novel sensor architecture based on thin film of tapioca decorated within nitrogen-doped titanium dioxide (N-TiO2) nanoparticles is reported. The nano-structures were characterized by scanning electron microscope, transmission electron microscope, X-rays diffraction and voltammetric techniques. The proposed electrode was used for detection of low concentrations of 17-beta estradiol in without purification step, which was investigated by using linear sweep adsorptive stripping voltammetry. Under optimal conditions, the analytical curve was linear over a 17 beta-estradiol concentration range of 9.9x10(-6) to 1.4x10(-5) molL(-1), with a detection limit of 1.7x10(-7) molL(-1). The tapioca and N-TiO2 nanoparticles homogeneous film was applied for detection of 17-beta-estradiol in tap water and synthetic urine samples, which presented satisfactory results. (AU)

• Processo FAPESP: 16/04743-6 - Eletrodo de carbono vítreo modificado com nanotubos de dióxido de titânio e filme de tapioca para detecção do hormônio estradiol
• Beneficiário: Gabriela Carolina Mauruto de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 15/19099-2 - Desenvolvimento de sensores e biossensores eletroquímicos para diversos fins analíticos
• Beneficiário: Bruno Campos Janegitz
• Modalidade de apoio: Auxílio à Pesquisa - Regular