Flexible Carbon Electrodes for Electrochemical Detection of Bisphenol-A, Hydroquinone and Catechol in Water Samples

Autor(es)

Sa, Acelino C. de ^{[1, 2]} ; Barbosa, Simone C. ^{[1, 2]} ; Raymundo-Pereira, Paulo A. ^[1] ; Wilson, Deivy ^[1] ; Shimizu, Flavio M. ^[3] ; Raposo, Maria ^[2] ; Oliveira, Jr., Osvaldo N. ^[1]

Afiliação do(s) autor(es)

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

^[2] Univ Nova Lisboa, Fac Sci & Technol, Phys Dept, CEFITEC, Campus Caparica, P-2829516 Caparica - Portugal

^[3] Univ Campinas UNICAMP, Gleb Wataghin Inst Phys IFGW, Dept Appl Phys, BR-13083859 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CHEMOSENSORS; v. 8, n. 4 DEC 2020.
• Citações Web of Science: 2

Resumo

The detection of pollutant traces in the public water supply and aquifers is essential for the safety of the population. In this article, we demonstrate that a simple electrochemical procedure in acidic solution can be employed for enhancing the sensitivity of flexible screen-printed carbon electrodes (SPEs) to detect bisphenol-A (BPA), hydroquinone, and catechol, simultaneously. The SPEs were pretreated electrochemically in a H2SO4 solution, which did not affect their morphology, yielding high current signals with well separated oxidation peaks. The sensitivity values were 0.28, 0.230, and 0.056 mu A L mu mol(-1) with detection limits of 0.12, 0.82, and 0.95 mu mol L-1 for hydroquinone, catechol, and BPA, respectively. The sensors were reproducible and selective for detecting BPA in plastic cups, and with adequate specificity not to be affected by interferents from water samples. The simple, inexpensive, and flexible SPE may thus be used to detect emerging pollutants and monitor the water quality. (AU)

• Processo FAPESP: 16/01919-6 - Design e fabricação de dispositivos flexíveis nanoestruturados para detecção de biomarcadores
• Beneficiário: Paulo Augusto Raymundo Pereira
• 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