Electrochemical Sensor Based on Beeswax and Carbon Black Thin Biofilms for Determination of Paraquat in Apis mellifera Honey

Author(s)

de Souza, Daniel Cardoso ^[1] ; Orzari, Luiz Otavio ^[1] ; de Oliveira, Paulo Roberto ^[1] ; Kalinke, Cristiane ^[2] ; Bonacin, Juliano Alves ^[2] ; Malaspina, Osmar ^[3] ; Ferreira Nocelli, Roberta Cornelio ^[1] ; Janegitz, Bruno Campos ^[1]

Affiliation

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

^[2] Univ Estadual Campinas, Inst Chem, BR-13083970 Campinas, SP - Brazil

^[3] Sao Paulo State Univ Unesp, Ctr Social Insects Studies, Inst Biosci, BR-13506900 Rio Claro, SP - Brazil

• Document type: Journal article
• Source: FOOD ANALYTICAL METHODS; v. 14, n. 3, p. 606-615, MAR 2021.
• Web of Science Citations: 1

Abstract

The development of new materials for electrochemical sensors has been received attention due to the search for sustainability. However, the use of in natura materials from vegetable and animal origin is still little explored for this purpose. Therefore, this work aims to use beeswax as biofilm, as an environmentally friendly and sustainable platform for incorporating carbon black nanoparticles. The electrode was prepared by a simple dispersion of beeswax and carbon black on the surface of the glassy carbon electrode. The proposed modified electrode was used to determine the herbicide paraquat (PQ) in 3 different samples of Apis mellifera honey. The presence of carbon black decreases the electrical resistance when compared with the bare electrode. The beeswax-carbon black film considerably increased the sensitivity of the PQ determination measures at a concentration range between 5.0 x 10(-7) and 7.5 x 10(-6) mol L-1. Samples with PQ contents between 7.5 x 10(-7) and 7.5 x 10(-6) mol L-1 presented recovery values from 97.2 to 114%. Also, the proposed sensor showed good repeatability and reproducibility for successive measurements. This suggests the use of the proposed electrode is feasible as an alternative strategy in the monitoring of herbicides in honey samples. (AU)

• FAPESP's process: 19/01844-4 - Development of nanostructured electrodes for determination of agrotoxic residues in honey
• Grantee: Paulo Roberto de Oliveira
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 19/00473-2 - Development of 3-dimensional (3D) printed electrochemical biosensors with PLA polymer and graphene for the determination of biomolecules and diagnosis of diseases
• Grantee: Cristiane Kalinke
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 13/22127-2 - Development of novel materials strategic for integrated analytical devices
• Grantee: Lauro Tatsuo Kubota
• Support type: Research Projects - Thematic Grants
• FAPESP's process: 17/21097-3 - Bee-agriculture interactions: perspectives to sustainable use
• Grantee: Osmar Malaspina
• Support type: Research Projects - Thematic Grants