Dopamine-functionalized cyclodextrins: modification of reduced graphene oxide based electrodes and sensing of folic acid in human serum.
Anal Bioanal Chem
; 411(20): 5149-5157, 2019 Aug.
Article
em En
| MEDLINE
| ID: mdl-31250067
A mandatory step in any sensor fabrication is the introduction of analyte-specific recognition elements to the transducer surface. In this study, the possibility to anchor ß-cyclodextrin-modified dopamine to a reduced graphene oxide based electrochemical transducer for the sensitive and selective sensing of folic acid is demonstrated. The sensor displays good electrocatalytic activity toward the oxidation of folic acid. The strong affinity of the surface-confined ß-cyclodextrin for folic acid, together with favorable electron transfer characteristics, resulted in a sensor with a detection limit of 1 nM for folic acid and a linear response up to 10 µM. Testing of the sensor on serum samples from healthy individuals and patients diagnosed with folic acid deficiency validated the sensing capability. Graphical abstract.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Dopamina
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Ciclodextrinas
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Eletrodos
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Ácido Fólico
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Grafite
Limite:
Humans
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article