Issue 29, 2025
From the journal:

Analytical Methods

A fluorescein based dual optical sensor for highly selective and sensitive fluoride detection in 100% water medium†

Bikash Chandra Mushahary,ab   Debajit Bora,a   Chayanika Goswami,a   Mayur Jyoti Bhuyan,a   Sudhangshu Priya Bharati,ac   Rituraj Das ORCID logo d  and  Sanjeev Pran Mahanta ORCID logo *a  

* Corresponding authors

a Department of Chemical Sciences, Tezpur University, Tezpur, Assam 784028, India
E-mail: samahanta@gmail.com, spm@tezu.ernet.in

b Department of Chemistry, Bodoland University, Assam 783370, India

c Department of Chemistry, Lumding College, Lumding, Assam 782447, India

d Department of Chemistry, Morigaon College, Morigaon, Assam, India

Abstract

A highly selective dual optical sensor for fluoride detection in 100% aqueous medium is reported, utilizing an Al3+-complex of fluorescein. The sensor exhibits distinct colorimetric and fluorometric responses, achieving detection limits of 0.7 ppm (UV-Vis) and 40 ppb (fluorescence). This method, validated on water samples and cellulose paper strips, offers a practical, low-cost approach for routine fluoride monitoring.

Graphical abstract: A fluorescein based dual optical sensor for highly selective and sensitive fluoride detection in 100% water medium

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Article information

DOI
https://doi.org/10.1039/D4AY02287D
Article type
Communication
Submitted
21 Dec 2024
Accepted
05 Jun 2025
First published
04 Jul 2025

Anal. Methods, 2025,17, 5997-6001

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A fluorescein based dual optical sensor for highly selective and sensitive fluoride detection in 100% water medium

B. C. Mushahary, D. Bora, C. Goswami, M. J. Bhuyan, S. P. Bharati, R. Das and S. P. Mahanta, Anal. Methods, 2025, 17, 5997 DOI: 10.1039/D4AY02287D

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