Disposable and low-cost electrochemical sensor based on the colorless nail polish and graphite composite material for tartrazine detection

Autor(es)

de Lima, Lucas F. ^[1] ; Ferreira, Andre L. ^[2] ; Maciel, Cristiane C. ^[3] ; Ferreira, Marystela ^[2] ; de Araujo, William R. ^[1]

Afiliação do(s) autor(es)

^[1] State Univ Campinas UNICAMP, Inst Chem, Dept Analyt Chem, Portable Chem Sensors Lab, POB 6154, BR-13083970 Campinas, SP - Brazil

^[2] Fed Univ Sao Carlos UFSCar, Ctr Sci & Technol Sustainabil CCTS, Sorocaba, SP - Brazil

^[3] Sao Paulo State Univ Unesp, Inst Sci & Technol, BR-18087180 Sorocaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Talanta; v. 227, MAY 15 2021.
• Citações Web of Science: 1

Resumo

A new method to manufacture electrochemical devices based on the graphite and colorless nail polish (N-grap) film was developed for tartrazine (Tz) detection. Scanning Electron Microscopy (SEM) demonstrates that the composite material presents a high porous carbon structure. Cyclic voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS) were employed to electrochemically characterize the electrode material, which corroborates the porous structure of the N-graph due to the enhanced electroactive area (5.4-fold increase) and presented a heterogeneous electron transfer rate constant (k(0)) of 5.82 x 10 (3) cm s (1) for potassium ferricyanide. The electrochemical determination of the Tz was carried out using square-wave voltammetry (SWV), under the optimized experimental conditions, which showed high sensitivity (0.793 A L mol (1)) and a lower limit of detection (LOD) of 2.10 x 10 (8) mol L (1) with a linear concentration ranging from 2.0 to 50.0 mu mol L (1). The developed sensor was applied for the analysis of Tz in sports drink samples and the result obtained by N-grap device was statistically compared with a spectrophotometric method demonstrating good accordance and the accuracy of the proposed method. Based on these results, we believe that this new fabrication method to produce disposable and low-cost electrochemical devices can be an alternative method for in-field analysis of dye in commercial sport drink samples and other relevant applications. (AU)

• Processo FAPESP: 19/02692-3 - Desenvolvimento de um biossensor óptico pela técnica de ressonância plasmônica de superfície (SPR) para a determinação de creatina kinase (CK-MB)
• Beneficiário: André Lopes Ferreira
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 18/08782-1 - Sensores químicos miniaturizados e integrados: novas plataformas de fabricação para aplicações biológicas, clínicas e ambientais
• Beneficiário: Mauro Bertotti
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/04061-8 - Filmes automontados de polipirrol e nanopartículas de magnetita na determinação analítica de parabenos
• Beneficiário: Lucas Felipe de Lima
• Modalidade de apoio: Bolsas no Brasil - Mestrado