Work

Enhancement of the dynamic range of the measurement of pH using a sensitive layer of methyl red-lophine

Year: 2025

Type: article

Abstract: This work presents the characterization of a membrane of an indicator dye, methyl red, combined with an imidazole, called lophine, based on different pH values in water. A spectroscopy study was carried out to analyze the pH dependence as a function of the absorbance to varying amounts of methyl red and lophine. This study shows the hyperchromic behavior of the membrane composed of both elements separately and finally, mixed subjected to different pH values. Finally, as an application, the use of this mixture as a coating for a section of optical fiber thinned by chemical attack is proposed.

Source: Optics Continuum

DOI: 10.1364/optcon.554342

Authors: P. M. Velasco-Bolom, V. I. Ruiz-Pérez, M. Pérez-Patricio, C. A. Hernández-Gutiérrez, J. L. Camas-Anzueto

Institutions: Tuxtla Gutierrez Institute of Technology, Tecnológico Nacional de México, Universidad Autónoma de Chiapas, Instituto Politécnico Nacional

Language: English

Topic: Analytical Chemistry and Sensors

Subfield: Bioengineering

Field: Chemical Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,372

Funder: Tecnológico Nacional de México