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

Author(s)

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]

Affiliation

^[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

• Document type: Journal article
• Source: JOURNAL OF SENSORS; v. 2021, MAR 9 2021.
• Web of Science Citations: 0

Abstract

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)

• FAPESP's process: 17/21097-3 - Bee-agriculture interactions: perspectives to sustainable use
• Grantee: Osmar Malaspina
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants
• FAPESP's process: 19/26953-0 - Electrochemical sensors and biosensors printed in 3D using graphene filament for detection of phenolic compounds
• Grantee: Wilson da Silva Fernandes Junior
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 13/22127-2 - Development of novel materials strategic for integrated analytical devices
• Grantee: Lauro Tatsuo Kubota
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 19/01844-4 - Development of nanostructured electrodes for determination of agrotoxic residues in honey
• Grantee: Paulo Roberto de Oliveira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral