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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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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]
Total Authors: 8
[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
Total Affiliations: 3
Document type: Journal article
Source: FOOD ANALYTICAL METHODS; v. 14, n. 3 OCT 2020.
Web of Science Citations: 1

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: 17/21097-3 - Bee-agriculture interactions: perspectives to sustainable use
Grantee:Osmar Malaspina
Support type: BIOTA-FAPESP Program - Thematic Grants
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