Highly Sensitive Electrochemical Sensor for Determination of Vitamin D in Mixtures of Water-Ethanol
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Data
2014-12-01
Autores
Cincotto, Fernando H. [UNESP]
Canevari, Thiago C. [UNESP]
Machado, Sergio A. S. [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Wiley-Blackwell
Resumo
This paper describes the electrochemical determination of vitamin D-2 (ergocalciferol) and D-3 (cholecalciferol) in mixed organic/water solvent, using a glassy carbon electrode (GCE). The mixing ratio of organic/water solvent has an important influence on the electrocatalytic response of D vitamins on the surface of the glassy carbon electrode. Well-defined peaks for Vitamin D-2 and D-3 were observed in a 40% ethanol/60% water solution with lithium perchlorate as the support electrolyte. This study demonstrated that the glassy carbon electrode is highly sensitive for the determination of vitamin D-2 and D-3, with a limit of detection of 0.13 and 0.118 mu molL(-1), respectively. No significant interference was seen for vitamins A, E and K in the detection of vitamin D.
Descrição
Palavras-chave
Vitamin D, Electrochemical sensors, Organic/water solution, Electroanalysis
Como citar
Electroanalysis. Weinheim: Wiley-v C H Verlag Gmbh, v. 26, n. 12, p. 2783-2788, 2014.