Uric acid electrochemical sensing in biofluids based on Ni/Zn hydroxide nanocatalyst

Autor(es)

Azeredo, Nathalia F. B. ^{[1, 2]} ; Goncalves, Josue M. ^{[1, 3]} ; Rossini, Pamela O. ^{[1, 3]} ; Araki, Koiti ^{[1, 3]} ; Wang, Joseph ^[2] ; Angnes, Lucio ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem, Dept Fundamental Chem, Sao Paulo - Brazil

^[2] Univ Calif San Diego, Dept Nanoengn, La Jolla, CA 92093 - USA

^[3] Wang, Joseph, Univ Calif San Diego, Dept Nanoengn, La Jolla, CA 92093 USA.Azeredo, Nathalia F. B., Univ Sao Paulo, Inst Chem, Dept Fundamental Chem, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Microchimica Acta; v. 187, n. 7 JUN 9 2020.
• Citações Web of Science: 0

Resumo

A highly sensitive sensor for quantification of uric acid (UA) directly in body fluids (saliva and sweat) is reported, working at a potential as low as 0.0 V vs Ag/AgCl. New mixed hydroxide materials exhibiting stable electrocatalytic responses from alkaline to acidic media were prepared, their structure was thoroughly characterized, and the electrochemical properties of the modified FTO (fluorine-doped tin oxide) electrodes were evaluated for UA determination by cyclic voltammetry, chronoamperometry,and batch injection analysis. A very low limit of detection (2.3 x 10(-8) mol L-1) with good repeatability (RSD = 3.2% for 30 successive analyses)was achieved based on a fast and simple BIA procedure. Finally, alpha-Ni0.75Zn0.25(OH)(2)screen-printed electrodes (SPE) were developed for the measurement of UA directly in real saliva and sweat samples, without interference of ascorbic acid, acetaminophen, lactate,and glucose at their typical concentrations present in those body fluids, revealing high potential for application as disposable sensors in biological systems. (AU)

• Processo FAPESP: 14/50867-3 - INCT 2014: Instituto Nacional de Ciência e Tecnologia de Bioanalítica
• Beneficiário: Marco Aurelio Zezzi Arruda
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/13137-5 - Formação e propriedades de hemiésteres do ácido carbônico em meio aquoso
• Beneficiário: Claudimir Lucio Do Lago
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/21489-1 - Nanotecnologia supramolecular: design, materiais e dispositivos
• Beneficiário: Henrique Eisi Toma
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/16896-7 - Desenvolvimento de sensores amperométricos e impedimétricos baseados em hidróxidos duplos de níquel e Vanádio (alfa-NixV1-x(OH)2) e seus nanocompósitos com grafite expansível/grafenos
• Beneficiário: Josué Martins Gonçalves
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado