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- Title
Determination of Norfloxacin by Sensitized Terbium Fluorescence in the Presence of Silver Nanoparticles and Surfactant Micelles.
- Authors
Smirnova, T. D.; Alyab'eva, E. A.; Yurasov, N. A.
- Abstract
The effect of silver nanoparticles and surfactant micelles on their joint presence on the intensity of the sensitized fluorescence of the norfloxacin complex with the Tb3+ ion is studied. It is shown that the intensity of the intrinsic fluorescence of norfloxacin and its complex with Tb3+ ions in the presence of silver nanoparticles decreases slightly. It is found that, in the presence of dodecyl sulfate micelles, a modification of the surface of silver nanoparticles occurs, which is accompanied by a change in the ζ-potential of the nanoclusters. Additions of surfactant-modified silver nanoparticles to aqueous solutions of terbium chelate contribute to an 11-fold increase in the intensity of the sensitized fluorescence. An increase in the efficiency of intramolecular energy transfer in the Tb3+ complex with norfloxacin in the presence of silver nanoparticles and dodecyl sulfate micelles made it possible to propose a method for the fluorimetric determination of the antibiotic in natural water in the concentration range 2 × 10–7−1 × 10–5 M. The equation of the calibration graph is y = 1.0 × 107x − 1.0, R2 = 0.991, the limit of detection is 5 × 10–8 M (3σ).
- Subjects
SENSITIZED fluorescence; TERBIUM; NORFLOXACIN; MICELLES; SURFACE active agents; COMPLEX ions; SILVER nanoparticles; SODIUM dodecyl sulfate
- Publication
Journal of Analytical Chemistry, 2024, Vol 79, Issue 5, p628
- ISSN
1061-9348
- Publication type
Article
- DOI
10.1134/S1061934824050137