Electrospun nanofibers versus drop casting films for designing an electronic tongue: comparison of performance for monitoring geosmin and 2-methylisoborneol in water samples

Autor(es)

Migliorini, Fernanda L. ^[1] ; Teodoro, Kelcilene B. R. ^[1] ; dos Santos, Danilo M. ^[1] ; Fonseca, Fernando J. ^[2] ; Mattoso, Luiz H. C. ^[1] ; Correa, Daniel S. ^[1]

Afiliação do(s) autor(es)

^[1] Embrapa Instrumentacao, Nanotechnol Natl Lab Agr, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Polytech Sch, Dept Engn Sistemas Eletron, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: POLYMERS FOR ADVANCED TECHNOLOGIES; v. 31, n. 9 APR 2020.
• Citações Web of Science: 0

Resumo

Geosmin (GSM) and 2-Methylisoborneol (MIB) are substances commonly found in river water and arise due to eutrophication process. Such contaminants affect the organoleptic properties of water, hampering its consumption, and use in beverage industries. As the human perception threshold for these compounds is low, the devices aimed at their detection must be sensitive enough to detect concentrations as low as a few nanogram per liter in order to guarantee the water quality parameters. Due to the experimental simplicity, fast analysis, portability, and capability for on-site analysis, the use of electronic tongues and electronic noses employing hybrid and composite materials are potential for GSM and MIB determination. In this work, two distinct electronic tongues were applied in the electrical determination of GSM and MIB in pure and river water. The difference between them consisted in the type of polymer processing used in the fabrication of sensing units. The thin films deposited onto gold IDEs were based on polyamide 6, polypirrole, and polyaniline, but fabricated by drop-casting and electrospinning. The differences in the electronic tongue performances were correlated to the distinct morphologies of the sensitive layers. Both devices were able to discriminate pure water from solutions tainted with GSM and MIB in concentration as low as 25 ng L-1, with high data correlation and a good reproducibility. (AU)

• Processo FAPESP: 17/20973-4 - Nanofibras eletrofiadas coaxiais à base de quitosana para a liberação controlada de antibióticos e aplicações no tratamento de lesões periodontais
• Beneficiário: Danilo Martins dos Santos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/09414-6 - Emprega do língua eletrônica utilizando sistema de análise em fluxo para análise de contaminantes em águas para consumo
• Beneficiário: Fernanda Lanzoni Migliorini
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 14/21184-5 - Nanocompósitos a partir de nanocristais de celulose e fibras eletrofiadas para o desenvolvimento de sensores poliméricos
• Beneficiário: Kelcilene Bruna Teodoro Costa
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/12174-4 - Desenvolvimento de nanofibras poliméricas híbridas para aplicação na agricultura
• Beneficiário: Daniel Souza Corrêa
• Modalidade de apoio: Auxílio à Pesquisa - Regular