Ultralow Cost Electrochemical Sensor Made of Potato Starch and Carbon Black Nanoballs to Detect Tetracycline in Waters and Milk

Autor(es)

Delgado, Karina P. ^[1] ; Raymundo-Pereira, Paulo A. ^[2] ; Campos, Anderson M. ^[3] ; Oliveira, Jr., Osvaldo N. ^[2] ; Janegitz, Bruno C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Nat Sci Math & Educ, BR-13600970 Araras, SP - Brazil

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

^[3] Univ Sao Paulo, Sao Carlos Inst Chem, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electroanalysis; v. 30, n. 9, p. 2153-2159, SEP 2018.
• Citações Web of Science: 3

Resumo

Detection of traces from pharmaceutical drugs such as antibiotics in drinking water and foodstuff is essential for guaranteeing human health in some environments, and this has to be done with low cost technologies to be widely deployed in public services and industry. In this paper, we describe an ultralow cost (<US\$0.005 per unit of sensing layer) electrochemical sensor to detect the antibiotic tetracycline, which is made of a homogeneous thin film of potato starch (PS) and carbon black (CB) deposited on glassy carbon electrodes (GCE). Detection of tetracycline was also performed in real samples consisting of tap water, river water, milk and in solutions prepared with commercial tablets of this medicine in the range between 5.0 and 120molL(-1), with a detection and quantification limit of 1.15 and 4.47molL(-1), respectively. The high sensitivity was attributed to the enhanced conductivity and larger surface area induced by incorporating the carbon black into potato starch. The CB-PS/GCE electrodes were reproducible and stable, thus serving as a generic platform for detection of other antibiotics and hormones whose redox potentials are similar to those of tetracycline. (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: 16/19885-0 - Determinação de tetraciclina em amostras diversas utilizando sensores modificados com carbon black e fécula de batata
• Beneficiário: Karina Paes Delgado
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 13/14262-7 - Filmes nanoestruturados de materiais de interesse biológico
• Beneficiário: Osvaldo Novais de Oliveira Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 15/19099-2 - Desenvolvimento de sensores e biossensores eletroquímicos para diversos fins analíticos
• Beneficiário: Bruno Campos Janegitz
• Modalidade de apoio: Auxílio à Pesquisa - Regular