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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Disposable electrochemical sensor based on shellac and graphite for sulfamethoxazole detection

Texto completo
Autor(es):
Henrique, Julia Melo [1] ; Camargo, Jessica Rocha [1] ; de Oliveira, Geiser Gabriel [2] ; Stefano, Jessica Santos [1] ; Janegitz, Bruno Campos [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Fed Sao Carlos, Dept Nat Sci Math & Educ, BR-13600970 Araras, SP - Brazil
[2] Fed Univ Tocantins, BR-77402970 Gurupi, Tocantins - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Microchemical Journal; v. 170, NOV 2021.
Citações Web of Science: 0
Resumo

The growth in the demand for mass analysis, in a fast and safe way, with good reliability and low cost has aroused great scientific interest in the search for new devices that prioritize precision and time. In this sense, this work presents a simple, disposable, and easy-to-use electrochemical sensor, developed on a waterproof paper substrate with a conductive ink based on shellac, a resin of natural origin, and graphite. The conductive ink was obtained through a simple mixture of its components and deposited on the paper substrate, being ready to use after a drying period. The new sensor was employed for the electrochemical detection of sulfamethoxazole (SMX), an antibiotic belonging to the class of sulfonamides, which presents great importance due to its direct impact on the flow of the food chain and is, therefore, commonly found as a metabolic residue in environmental and food samples. Using the differential pulse voltammetry technique, a linear range of 5.0 mu mol L-1 -100 mu mol L-1 and a limit of detection of 0.4 mu mol L-1 were obtained. The electrochemical sensor was also employed for the analysis of SMX in water and milk samples, and recovery values between 91 and 110% were obtained, proving that the development and application of the new conductive ink proposed for the fabrication of disposable devices provided an efficient electrochemical detection of SMX in the applied samples. (AU)

Processo FAPESP: 19/23177-0 - Desenvolvimento de dispositivos descartáveis com tintas condutoras e substratos de baixo custo para o biossensoriamento de disfunções hormonais e detecção de Malária
Beneficiário:Jéssica Rocha Camargo
Linha de fomento: Bolsas no Brasil - Doutorado Direto
Processo FAPESP: 17/21097-3 - Interações abelha-agricultura: perspectivas para a utilização sustentável
Beneficiário:Osmar Malaspina
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 20/04189-4 - Sensores descartáveis com tinta condutora a base de grafite e goma laca em papel impermeável para detecção de sulfametoxazol
Beneficiário:Julia Melo Henrique
Linha de fomento: Bolsas no Brasil - Iniciação Científica