Electroanalysis
Electroanalysis
3 years ago

Tapioca Biofilm Containing Nitrogen-Doped Titanium Dioxide Nanoparticles for Electrochemical Detection of 17-β Estradiol

Tapioca Biofilm Containing Nitrogen-Doped Titanium Dioxide Nanoparticles for Electrochemical Detection of 17-β Estradiol
Gabriela C. Mauruto de Oliveira, Bruno C. Janegitz, Roberto de Matos, Elisangela P. de Palma, Roberta Antigo Medeiros, Kelly Roberta Francisco, Marcos H. Kunita
A novel sensor architecture based on thin film of tapioca decorated within nitrogen-doped titanium dioxide (N-TiO2) nanoparticles is reported. The nanostructures 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-β 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 17β-estradiol concentration range of 9.9×10−6 to 1.4×10−5 mol L−1, with a detection limit of 1.7×10−7 mol L−1. The tapioca and N-TiO2 nanoparticles homogeneous film was applied for detection of 17-β-estradiol in tap water and synthetic urine samples, which presented satisfactory results.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/elan.201700392

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