Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7229269 | Biosensors and Bioelectronics | 2018 | 25 Pages |
Abstract
The modification of electrode surfaces has been the target of study for many researchers in order to improve the analytical performance of electrochemical sensors. Herein, the use of an imidazole-functionalized graphene oxide (GO-IMZ) as an artificial enzymatic active site for voltammetric determination of progesterone (P4) is described for the first time. The morphology and electrochemical performance of electrode modified with GO-IMZ were characterized by scanning electron microscopy and cyclic voltammetry, respectively. Under optimized conditions, the proposed sensor showed a synergistic effect of the GO sheets and the imidazole groups anchored on its backbone, which promoted a significant enhancement on electrochemical reduction of P4. Figures of merits such as linear dynamic response for P4 concentration ranging from 0.22 to 14.0â¯Î¼molâ¯Lâ1, limit of detection of 68â¯nmolâ¯Lâ1 and limit of quantification and 210â¯nmolâ¯Lâ1 were found. In addition, presented a higher sensitivity, 426â¯nAâ¯Lâ¯Âµmolâ1, when compared to the unmodified electrode. Overall, the proposed device showed to be a promising platform for a simple, rapid, and direct analysis of progesterone.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Ava Gevaerd, Sirlon F. Blaskievicz, Aldo J.G. Zarbin, Elisa S. Orth, Márcio F. Bergamini, Luiz H. Marcolino-Junior,