A sensitive paper-based sensor for fluoride detection in water using Tb3+ photoluminescence

Chaturvedi, PK and Maitra, U (2024) A sensitive paper-based sensor for fluoride detection in water using Tb3+ photoluminescence. In: Sensors and Diagnostics, 3 (5). pp. 809-816.

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Abstract

Fluoride is a vital trace mineral for healthy bones and teeth, but a higher intake can lead to nephrolithiasis, dental/skeletal fluorosis, etc. Many dry regions worldwide contain higher fluoride than the WHO permissible limit of 1.5 ppm, necessitating a simple fluoride detection protocol. We adopted a fluoride-triggered desilylation strategy, which releases a sensitizer and enhances Tb3+ luminescence in a TbCh gel matrix. Under the optimized assaying conditions, the pro-sensitizer exhibited a selective response with a detection limit of 27 ppb, well below the WHO permissible limit. We also immobilized the gels on paper discs to detect fluoride from real-life samples (e.g., toothpaste, groundwater), and the results were validated using the standard ISE method. The promising results suggest nonexpert users adapting the protocol in resource-limited areas to provide quality control analysis. © 2024 RSC.

Item Type:	Journal Article
Publication:	Sensors and Diagnostics
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright for this article belongs to authors.
Department/Centre:	Division of Chemical Sciences > Organic Chemistry
Date Deposited:	29 Aug 2024 06:19
Last Modified:	29 Aug 2024 06:19
URI:	http://eprints.iisc.ac.in/id/eprint/84847

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