Optical Fiber Sensor as an Alternative for Colorimetric Image Processing for the Assessment of Dye Concentration

Author(s)

Soares, Marco C. P. ; Mendes, Beatriz F. ; Gomes, Matheus K. ; Bataglioli, Rogerio A. ; Schenkel, Egont A. ; Vit, Franciele F. ; de la Torre, Lucimara G. ; Fujiwara, Eric ; Suzuki, Carlos K. ; IEEE

• Document type: Journal article
• Source: 2018 SBFOTON INTERNATIONAL OPTICS AND PHOTONICS CONFERENCE (SBFOTON IOPC); v. N/A, p. 5-pg., 2018-01-01.

Abstract

Methylene blue dye is commonly used for understanding chemical processes, such as tracking chemical reactions and assessing purification processes. Here, solutions of methylene blue-ethanol-water were evaluated with an optical fiber reflectometer and with an image-based colorimetric system. Then, silica nanoparticles synthesized by vapor-phase axial deposition were tested for separation processes, being assessed in relation to their capacity in adsorbing methylene blue. The fiber sensor and the colorimeter presented 0.419 L.mg(-1) and 0.596 L.mg(-1) sensitivities, respectively, and yielded equivalent results, demonstrating that the fiber approach may be employed as a more robust alternative to the colorimetric method. (AU)

• FAPESP's process: 17/06190-7 - Characterization of silicon dioxide nanofluids using the fiber optic sensor
• Grantee: Matheus Kaue Gomes
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 17/20445-8 - Development of fiber optic sensor for reflectance and light scattering monitoring for microfluidics applied to biotechnology
• Grantee: Marco César Prado Soares
• Support Opportunities: Scholarships in Brazil - Master