Paper-based electrochemical sensors with reduced graphene nanoribbons for simultaneous detection of sulfamethoxazole and trimethoprim in water samples

Autor(es)

Martins, Thiago S. ^[1] ; Bott-Neto, Jose L. ^[2] ; Oliveira, Jr., Osvaldo N. ^[2] ; Machado, Sergio A. S. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Inst Chem, BR-13560970 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13560970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 882, FEB 1 2021.
• Citações Web of Science: 1

Resumo

Failure to control the levels of emerging pollutants in water supply can affect the quality of human life, and this maybe mitigated with a low-cost, real-time monitoring system. Herein, we describe a paper-based fully printed electrochemical sensor with reduced graphene nanoribbons (rGNR) capable of detecting sulfamethoxazole (SMX) and trimethoprim (TMP) antibiotics simultaneously in real water samples. The electrodes were printed on parchment paper, which is environmentally friendly and has an efficient printing capacity. Deposition of rGNRs in the matrix was confirmed with Raman spectroscopy, transmission electron microscopy (TEM), and X-ray photoemission spectroscopy (XPS). Optimized sensing performance was obtained using an electrochemical treatment of the electrodes at neutral pH. The paper-based sensor displayed a linear response from 1 mu mol l-1 to 10 mu mol l-1 for both antibiotics, with detection limits of 0.09 mu mol l-1 and 0.04 mu mol l-1 for SMX and TMP, respectively. The sensor was reproducible, with an RSD below 5%,and selective for the antibiotics including in real samples, in a demonstration of its potential for realtime monitoring of water supply systems. <comment>Superscript/Subscript Available</comment (AU)

• Processo FAPESP: 19/13514-9 - Sensores eletroquímicos com matriz contendo pontos quânticos ou nanofitas de grafeno para detecção de biomarcadores
• Beneficiário: Jose Luiz Bott Neto
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/22214-6 - Rumo à convergência de tecnologias: de sensores e biossensores à visualização de informação e aprendizado de máquina para análise de dados em diagnóstico clínico
• Beneficiário: Osvaldo Novais de Oliveira Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/01777-5 - Confecção de dispositivos eletroquímicos descartáveis compostos por nanoesferas ocas de carbono e nanofios de carbono decorados com nanopartículas de prata para a quantificação de interferentes endócrinos em amostras de água de abastecimento
• Beneficiário: Sergio Antonio Spinola Machado
• Modalidade de apoio: Auxílio à Pesquisa - Regular