Electrochemical Sensor Based on Casein and Carbon Black for Bisphenol A Detection

Autor(es)

Jodar, Leticia Vieira ^[1] ; Orzari, Luiz Otavio ^[1] ; Ortolani, Tulio Storti ^[1] ; Assumpcao, Monica H. M. T. ^[2] ; Vicentini, Fernando C. ^[2] ; Janegitz, Bruno C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Nat Sci Math & Educ, BR-13600970 Araras, SP - Brazil

^[2] Univ Fed Sao Carlos, Ctr Nat Sci, Rod Lauri Simoes Barros Km 12, Buri, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electroanalysis; v. 31, n. 11 JULY 2019.
• Citações Web of Science: 0

Resumo

Bisphenol A (BPA) is an environmental endocrine disrupting chemical, which can lead to various adverse health effects. Aiming to develop effective tools for the detection of BPA, this work reports a low cost and stable film based on casein (CAS) and Carbon Black (CB). The proposed material (CAS-CB) showed structures of CAS surrounded by CB agglomerates observed by Scanning Electron Microscopy while Fourier Transform Infrared Spectroscopy analysis illustrated characteristic bands of casein. Cyclic Voltammetry (CV) and linear sweep voltammetry (LSV) were used to investigate the electrochemical behavior of BPA using the CAS-CB. Under optimal conditions, LSV detection presented a limit of detection of 0.25 mu mol L-1 in a linear range from 0.49 to 24 mu mol L-1. Additionally, the working electrode (GC) modified by the proposed film (CAS-CB) was applied for BPA sensing in environmental and milk samples. The results showed recoveries between 95.4 to 114 % attesting the efficiency of this new material, which has simplicity in the preparation, high conductivity, and adsorption capability. (AU)

• Processo FAPESP: 15/19099-2 - Desenvolvimento de sensores e biossensores eletroquímicos para diversos fins analíticos
• Beneficiário: Bruno Campos Janegitz
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/21898-6 - Novos dispositivos condutores para aplicação em sensores e biossensores eletroquímicos
• Beneficiário: Bruno Campos Janegitz
• Modalidade de apoio: Auxílio à Pesquisa - Regular