Electrochemical Sensor Based on Nanodiamonds and Manioc Starch for Detection of Tetracycline

Autor(es)

Fernandes-Junior, Wilson Silva ^[1] ; Zaccarin, Leticia Fernanda ^[1] ; Oliveira, Geiser Gabriel ^[2] ; de Oliveira, Paulo Roberto ^[1] ; Kalinke, Cristiane ^[3] ; Bonacin, Juliano Alves ^[3] ; Prakash, Jai ^[4] ; Janegitz, Bruno Campos ^[1]

Afiliação do(s) autor(es)

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

^[2] Fed Univ Tocantins, BR-77402970 Gurupi, TO - Brazil

^[3] Univ Estadual Campinas, Inst Chem, BR-13083859 Campinas, SP - Brazil

^[4] Natl Inst Technol Hamirpur, Dept Chem, Hamirpur 177005 - India

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF SENSORS; v. 2021, MAR 9 2021.
• Citações Web of Science: 0

Resumo

The use of nanostructured materials is already well-known as a powerful tool in the development of electrochemical sensors. Among several immobilization strategies of nanomaterials in the development of electrochemical sensors, the use of low-cost and environmentally friendly polymeric materials is highlighted. In this context, a new nanostructured biocomposite electrode is proposed as an electrochemical sensor for the analysis and determination of tetracycline. The composite electrode consists of a modified glassy carbon electrode (GCE) with a nanodiamond-based (ND) and manioc starch biofilm (MS), called ND-MS/GCE. The proposed sensor showed better electrochemical performance in the presence of tetracycline in comparison to the unmodified electrode, which was attributed to the increase in the electroactive surface area due to the presence of nanodiamonds. A linear dynamic range from 5.0 x 10(-6) to 1.8 x 10(-4) mol L-1 and a limit of detection of 2.0 x 10(-6) mol L-1 were obtained for the proposed sensor. ND-MS/GCE exhibited high repeatability and reproducibility for successive measurements with a relative standard deviation (RSD) of 6.3% and 1.5%, respectively. The proposed electrode was successfully applied for the detection of tetracycline in different kinds of water samples, presenting recoveries ranging from 86 to 112%. (AU)

• Processo FAPESP: 17/21097-3 - Interações abelha-agricultura: perspectivas para a utilização sustentável
• Beneficiário: Osmar Malaspina
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 19/26953-0 - Sensores e biossensores eletroquímicos impressos em 3D utilizando filamento de grafeno para a detecção de compostos fenólicos
• Beneficiário: Wilson da Silva Fernandes Junior
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 13/22127-2 - Desenvolvimento de novos materiais estratégicos para dispositivos analíticos integrados
• Beneficiário: Lauro Tatsuo Kubota
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/01844-4 - Desenvolvimento de eletrodos nanoestruturados para a determinação de resíduos agrotóxicos em mel
• Beneficiário: Paulo Roberto de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado