Evaluation of herringbone carbon nanotubes-modified electrodes for the simultaneous determination of ascorbic acid and uric acid

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Title: Evaluation of herringbone carbon nanotubes-modified electrodes for the simultaneous determination of ascorbic acid and uric acid
Authors: Abellán-Llobregat, Alejandra | Vidal, Lorena | Rodríguez-Amaro, Rafael | Canals, Antonio | Morallon, Emilia
Research Group/s: Espectroscopía Atómica-Masas y Química Analítica en Condiciones Extremas | Electrocatálisis y Electroquímica de Polímeros
Center, Department or Service: Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Herringbone carbon nanotubes | Electrochemical sensors | Ascorbic acid | Uric acid
Knowledge Area: Nutrición y Bromatología | Química Analítica | Química Física
Issue Date: 20-Sep-2018
Publisher: Elsevier
Citation: Electrochimica Acta. 2018, 285: 284-291. doi:10.1016/j.electacta.2018.08.007
Abstract: An array of gold interdigitated microelectrodes (Au-IDA) has been modified by casting herringbone carbon nanotubes (hCNTs) producing a new electrochemical sensor suitable for the simultaneous determination of ascorbic acid (AA) and uric acid (UA) in PBS (0.25 M, pH 7.0). The sensor showed good electrocatalytic properties for both analytes with low working potentials, linear ranges between 0 and 600 μM for AA, and between 0 and 420 μM for UA. The empirical limits of detection (LODs) and the limits of quantification (LOQs) for both analytes were 15 μM and 50 μM, respectively. Moreover, UA does not interfere in the measurement of AA and vice versa. Furthermore, the presence of common analytes in physiological fluids as glucose, dopamine and epinephrine do not interfere in the quantification neither AA nor UA.
Sponsor: This work is supported by the Ministerio de Economía y Competitividad (MAT2016-76595-R) and FEDER. A. Abellán also thanks the Generalitat Valenciana for her fellowship.
URI: http://hdl.handle.net/10045/79208
ISSN: 0013-4686 (Print) | 1873-3859 (Online)
DOI: 10.1016/j.electacta.2018.08.007
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Elsevier Ltd.
Peer Review: si
Publisher version: https://doi.org/10.1016/j.electacta.2018.08.007
Appears in Collections:INV - SP-BG - Artículos de Revistas
INV - GEPE - Artículos de Revistas

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