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- Title
Disposable electrochemical sensor based on carbon black and ternary oxide (SiO<sub>2</sub>/TiO<sub>2</sub>/Nb<sub>2</sub>O<sub>5</sub>) for determination of triclosan in mouthwash and water samples.
- Authors
de Oliveira, Guilherme Barros; Silva, Francisco Walison Lima; Fernandes, Julia Oliveira; Bernardino, Cassiano Augusto Rolim; Mahler, Claudio Fernando; Braz, Bernardo Ferreira; Archanjo, Braulio Soares; Ribeiro, Emerson Schwingel; Santelli, Ricardo Erthal; Cincotto, Fernando Henrique
- Abstract
A new screen-printed electrode (SPE) modified with carbon black and ternary oxide (SiO2/TiO2/Nb2O5), denominated SPE/CB/SiTiNb and was developed for the direct detection of triclosan in tap water and mouthwash samples. The morphological characterization and electrochemical behavior of the sensors were performed by scanning electron microscopy, energy dispersive spectroscopy, and cyclic voltammetry. Differential pulse voltammetry was used to evaluate the proposed sensor in Britton–Robinson buffer 0.1 mol L−1 and showed a limit detection of 1.23 nmol L−1 in a linear range from 0.025 to 57.01 µmol L−1. Studies with possible interferents were performed demonstrating a significant selectivity of the sensor to the triclosan oxidation reaction. The sensor was applied in tap water and mouthwash real sample analyses, whose recoveries ranged from 93.4 to 98.8%, demonstrating that the sensor shows promise in the detection of triclosan in different matrices allied to high sensitivity, selectivity, low-cost, portability, disposability, and low sample volume, without pre-treatment, per analysis.
- Subjects
ELECTROCHEMICAL sensors; TRICLOSAN; CARBON-black; WATER sampling; MOUTHWASHES
- Publication
Journal of Solid State Electrochemistry, 2024, Vol 28, Issue 7, p2257
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-023-05749-7