New Disposable Electrochemical Paper-based Microfluidic Device with Multiplexed Electrodes for Biomarkers Determination in Urine Sample

Autor(es)

Fava, Elson Luiz ^[1] ; do Prado, Thiago Martimiano ^[1] ; Silva, Tiago Almeida ^{[1, 2]} ; de Moraes, Fernando Cruz ^[1] ; Faria, Ronaldo Censi ^[1] ; Fatibello-Filho, Orlando ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem, POB 676, BR-13560970 Sao Carlos, SP - Brazil

^[2] Fed Ctr Technol Educ Minas Gerais, Dept Met & Chem, BR-35180008 Timoteo, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electroanalysis; v. 32, n. 5 JAN 2020.
• Citações Web of Science: 0

Resumo

A disposable electrochemical paper-based analytical device was constructed based on use of sequential analysis with multiplexed working electrodes and applied for the determination of glucose, creatinine, and uric acid. The device was constructed with 16 microfluidic channels, with 16 working electrodes arranged in four set with four components surrounding the sample injection hole. In addition, a commercial multiplexing module was used, which allowed for multiplexing of the 16 working electrodes. This design allowed for radial and homogeneous sample elution to each sensing spot for high throughput analysis. In the multiplexed determinations, distinct electrochemical procedures were employed for each analyte. Furthermore, each working electrode spot was modified to increase the respective analytical signals. For glucose detection, the sensor was based on electron mediation by ferrocenecarboxylic acid over the modified surface with glucose oxidase. The principle for creatinine detection was based on electrochemical reduction of non-complexed Fe3+ in excess after complex formation between Fe3+ and creatinine in the chemical step. The anodic peak current responses for uric acid detection increased due to working electrode surface modification with carbon black nanoparticles. In the multiplexed analysis, the device provided limits of detection of 0.120 mmol L-1, 0.084 mmol L-1, and 0.012 mmol L-1 for glucose, creatinine, and uric acid, respectively. The developed device was successfully applied in the analyses of real urine samples. (AU)

• Processo FAPESP: 17/24053-7 - Desenvolvimentos de métodos eletroquímicos simples para a detecção de biomarcadores visando o diagnóstico de doenças
• Beneficiário: Ronaldo Censi Faria
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/10012-4 - Desenvolvimento de dispositivo microfluídico descartável contendo arranjos de biossensores para a determinação multiplexada de espécies de interesse biológico em diferentes matrizes
• Beneficiário: Elson Luiz Fava
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/10118-0 - Estudo e aplicação da tecnologia eletroquímica para a análise e a degradação de interferentes endócrinos: materiais, sensores, processos e divulgação científica
• Beneficiário: Marcos Roberto de Vasconcelos Lanza
• Linha de fomento: Auxílio à Pesquisa - Temático