Caffeine quantification, using carbon quantum dots (CQDs) as a fluorosensor
Abstract
The carbon quantum dots (CQDs) are a kind of new nanomaterials and as their name indicates, they are based on carbon, where the natural sources that are used for the synthesis are rich in functional groups that allow the functionalization of the surface during the process and which, in turn, has luminescent properties. The synthesis of CQDs was carried outby carbonization of Hibiscus sabdariffa, also known as Jamaican flower. The synthesis is fast and inexpensive, as well as friendly to the environment because water is used as a solvent. The objective of this research is to take advantage of the optical properties of nanoparticles for the indirect quantification of caffeine in real samples through the inhibition of its fluorescence. The performance parameters of the calibration curve were LOD = 1.670 mg×L-1, LOQ = 5.566 mg×L-1, LOL= (5.6 - 20.0) mg×L-1, sensitivity = (8.63 ± 0.29) x 10-4 mg-1×L.
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Copyright (c) 2023 Brandon Arredondo-Martínez; Jorge Juárez-Gómez; Dafne Sarahia Guzmán-Hernández, María Teresa Ramírez-Silva, Alberto Rojas-Hernández
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