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

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: FOOD ANALYTICAL METHODS; v. 14, n. 3, p. 606-615, MAR 2021.
• Citações Web of Science: 1

Resumo

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)

• 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
• Processo FAPESP: 19/00473-2 - Desenvolvimento de biossensores eletroquímicos impressos em 3 dimensões (3D) com polímero PLA e grafeno para a determinação de biomoléculas e diagnóstico de doenças
• Beneficiário: Cristiane Kalinke
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• 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: 17/21097-3 - Interações abelha-agricultura: perspectivas para a utilização sustentável
• Beneficiário: Osmar Malaspina
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático