Determination of Rutin in Drinks Using an Electrode Modified with Carbon Nanotubes-Prussian Blue
- Authors: Nagles E.1, Penagos-Llanos J.2, García-Beltrán O.1, Hurtado J.3
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Affiliations:
- Facultad de Ciencias Naturales y Matemáticas
- Facultad de Ciencias Básicas
- Departamento de Química
- Issue: Vol 73, No 5 (2018)
- Pages: 504-511
- Section: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/183043
- DOI: https://doi.org/10.1134/S1061934818050064
- ID: 183043
Cite item
Abstract
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.
About the authors
Edgar Nagles
Facultad de Ciencias Naturales y Matemáticas
Author for correspondence.
Email: edgar.nagles@unibague.edu.co
Colombia, Ibagué, 730001
Johisner Penagos-Llanos
Facultad de Ciencias Básicas
Email: edgar.nagles@unibague.edu.co
Colombia, Florencia
Olimpo García-Beltrán
Facultad de Ciencias Naturales y Matemáticas
Email: edgar.nagles@unibague.edu.co
Colombia, Ibagué, 730001
John Hurtado
Departamento de Química
Email: edgar.nagles@unibague.edu.co
Colombia, Bogotá