This report presents a new application for the chitosan–graphene glassy carbon electrode (Ch-G/GCE) system in the determination of the hydroxyflavonoid morin (MR), one of the flavonoids with the highest favorable activity for people, due to its natural properties by square-wave voltammetry (SWV). The anodic peak current for MR was observed at 0.50 V with an increase of 73% compared with the glassy carbon electrode unmodified. The surface areas of Ch-G/GCE, Ch/GCE and GCE evaluated by cyclic voltammetry were 0.140, 0.053 and 0.011 cm2, respectively. Additionally, an increase greater than 100% compared to the electrode without modification was observed. The detection limit was 0.30 µmol/L for MR, and the relative standard deviations (RSDs) were 1.8% (n = 6). Possible interferences as quercetin, rutin, and applications in real samples were also evaluated with very acceptable results.
Bibliographical noteFunding Information:
E.N. appreciates the financial support provided by the Universidad Nacional Mayor de San Marcos. Facultad de Ciencias at the Universidad de los Andes project number INV-2020-105-2038.
The financial support provided by the Universidad Nacional Mayor de San Marcos (project C21070961 and C20071301).
© 2022 by the authors.
- glassy carbon
- square wave voltammetry