Por favor, use este identificador para citar o enlazar este ítem: https://hdl.handle.net/20.500.12313/581
Título : Determination of Rutin in Drinks Using an Electrode Modified with Carbon Nanotubes-Prussian Blue
Autor : Nagles, Edgar
Penagos-Llanos, Johisner
García-Beltrán, Olimpo
Hurtado, John
Palabras clave : Rutin
Black tea
Coffee
Synthetic tea drink
Adsorptive stripping voltammetry
Prussian blue
Fecha de publicación : 2-may-2018
Editorial : Journal of Analytical Chemistry
Citación : Nagles, E., Penagos-Llanos, J., García-Beltrán, O., & Hurtado, J. (2018). Determination of Rutin in Drinks Using an Electrode Modified with Carbon Nanotubes-Prussian Blue. Journal of Analytical Chemistry, 73(5), 504–511.
Resumen : A new sensor was developed using a screen-printed carbon electrode modified with single-walled carbon nanotubes (SWCNTs) and Prussian blue (PB) coated with chitosan. The modified electrode allowed the oxidation and reduction of rutin at 0.25 and 0.096 V, respectively, with a ΔE of 0.154 V. Furthermore, the peak currents increase nearly 100% compared with the electrode without modification. The process was more reversible compared with the electrode modified with only SWCNTs or PB. Cyclic voltammetry was used to characterize the modified electrode surface. The quantification of rutin was more sensitive with adsorptive stripping voltammetry than with anodic stripping voltammetry. Adsorption potential, adsorption time and pH were optimized based on the oxidation of rutin: Eads =–0.10 V, tads = 60 s, pH 3.0. The detection limit (3σ/b) was 0.01 μM and the relative standard derivation was 3%. The new sensor was used in the quantification of rutin in black tea, coffee and synthetic drink of tea with satisfactory results.
URI : http://repositorio.unibague.edu.co:80/jspui/handle/20.500.12313/581
ISSN : 1061-9348
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