lexible and integrated dual carbon sensor for multiplexed detection of nonylphenol and paroxetine in tap water sample

Autor(es)

Gomes, Nathalia O. ^[1] ; Mendonca, Camila D. ^[1] ; Machado, Sergio A. S. ^[1] ; Oliveira, Jr., Osvaldo N. ^[2] ; Raymundo-Pereira, Paulo A. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Inst Chem, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Microchimica Acta; v. 188, n. 10 OCT 2021.
• Citações Web of Science: 0

Resumo

Multiplex detection of emerging pollutants is essential to improve quality control of water treatment plants, which requires portable systems capable of real-time monitoring. In this paper we describe a flexible, dual electrochemical sensing device that detects nonylphenol and paroxetine in tap water samples. The platform contains two voltammetric sensors, with different working electrodes that were either pretreated or functionalized. Each working electrode was judiciously tailored to cover the concentration range of interest for nonylphenol and paroxetine, and square wave voltammetry was used for detection. An electrochemical pretreatment with sulfuric acid on the printed electrode enabled a selective detection of nonylphenol in 1.0-10 x 10(-6) mol L-1 range with a limit of detection of 8.0 x 10(-7) mol L-1. Paroxetine was detected in the same range with a limit of detection of 6.7 x 10(-7) mol L-1 using the printed electrode coated with a layer of carbon spherical shells. Simultaneous detection of the two analytes was achieved in tap water samples within 1 min, with no fouling and no interference effects. The long-term monitoring capability of the dual sensor was demonstrated in phosphate buffer for 45 days. This performance is statistically equivalent to that of high-performance liquid chromatography (HPLC) for water analysis. The dual-sensor platform is generic and may be extended to other water pollutants and clinical biomarkers in real-time monitoring of the environment and health conditions. (AU)

• 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
• 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: 16/06139-9 - Desenvolvimento de um sensor foto-eletroquímico nanoestruturado para o monitoramento de p-nitrofenol em águas de abastecimento
• Beneficiário: Camila Domingues Mendonça Verbinnen
• Modalidade de apoio: Bolsas no Brasil - Doutorado