Journal
SENSORS
Volume 22, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/s22207780
Keywords
glassy carbon; chitosan; graphene; morin; square wave voltammetry
Funding
- Universidad Nacional Mayor de San Marcos [C21070961, C20071301]
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This report presents a new application of the chitosan-graphene glassy carbon electrode (Ch-G/GCE) system for the determination of hydroxyflavonoid morin (MR). The system utilizes square-wave voltammetry (SWV) to measure MR, and exhibits a significant increase in anodic peak current compared to the unmodified glassy carbon electrode.
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 cm(2), respectively. Additionally, an increase greater than 100% compared to the electrode without modification was observed. The detection limit was 0.30 mu mol/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.
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