Electrochemical Sensor Based on Casein and Carbon Black for Bisphenol A Detection. Issue 11 (2nd July 2019)

• Record Type: Journal Article
• Authors: Vieira Jodar, Letícia; Orzari, Luiz Otávio; Storti Ortolani, Túlio; Assumpção, Mônica H. M. T.; Vicentini, Fernando C.; Janegitz, Bruno C.
• Is Part Of: Electroanalysis. Volume 31:Issue 11(2019)
• Page Start: 2162
• Page End: 2170
• Publication Date: 2019-07-02
• Subjects: Bisphenol A -- Carbon black -- Casein Film -- Electrochemistry -- Sensor; Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201900176
• Languages: English
• ISSNs: 1040-0397

Abstract

Abstract: 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 μmol L −1 in a linear range from 0.49 to 24 μmol 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. Abstract :