FLUORESCENCE QUENCHING BASED SENSING OF MERCURY ION USING QUINOLINE BASED NANOPROBE
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Abstract
The reprecipitation technique was utilized to prepare organic nanoparticles of 8-hydroxyquinoline, which were then employed for the detection of Hg²⁺ ions in aqueous solutions via fluorescence quenching. The formation of the organic nanoparticles was confirmed using UV-Visible spectroscopy, fluorescence spectroscopy, and dynamic light scattering techniques. The extended lifetime of the nanoparticle suspension indicates their formation through aggregation. The prepared nanoparticle suspension demonstrated high selectivity for Hg²⁺ ions in the presence of other cations. The developed method was also applied to detect Hg²⁺ ions in real environmental samples, with a limit of detection of 0.6920 µg/mL. The Stern-Volmer plot showed excellent linearity for Hg²⁺ ion concentrations ranging from 0 to 6 µg/mL, with an R² value of 0.990.
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A. A. Kamble
Assistant professor, Department of chemistry, Padmabhushan Vasantraodada Patil Mahavidyalaya, Kavathemahankal