Diuron metabolite monitoring using electrochemical sensor-based molecular imprinting technology

Author(s)

Zendron, Rafaela Lemes ; dos Santos, Paula Mantovani ; Tarley, Cesar Ricardo Teixeira ; Sotomayor, Maria D. P. T. ; Wong, Ademar

• Document type: Journal article
• Source: Journal of Solid State Electrochemistry; v. N/A, p. 12-pg., 2025-01-15.

Abstract

In this work, the synthesis of molecularly imprinted polymers was carried out using allyl alcohol as functional monomer. The developed materials were characterized morphologically using confocal microscopy and electron microscopy (scanning and transmission). Furthermore, a chemical characterization of the polymers was performed using Fourier transform infrared spectroscopy (FTIR) and BET analysis with the intent of verifying the presence of functional groups and determining the specific surface areas. Aiming to prove that the developed polymer has selective and sensitive adsorption to 3,4-DCA, it was proposed an electrochemical sensor modified with Fe3O4@MIP. Under optimal analysis conditions using square wave voltammetry (SWV), the sensor showed a linear response range from 5.0 x 10(-7) to 1.6 x 10(-5) mol L-1 and a detection limit of 3.2 x 10(-8) mol L-1. The selectivity of the sensor was confirmed when compared with various chemical compounds. Finally, the sensor was applied to real environmental samples, where the results obtained were similar to the results obtained in the HPLC-UV (comparative method), demonstrating the viability of the proposed method. (AU)

• FAPESP's process: 22/16154-6 - Synthesis of magnetic nanoparticles modified with MIP for identification of 3,4-dichloroaniline by chromatographic and electrochemical method
• Grantee: Rafaela Lemes Zendron
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 22/03553-0 - RADEs-MIP-PCa: development of rapid analysis devices for monitoring of PSA and sarcosine, Prostate Cancer (PCa) biomarkers employing biomimetic polymers based on molecular impression technology
• Grantee: Maria Del Pilar Taboada Sotomayor
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
• Grantee: Maria Valnice Boldrin
• Support Opportunities: Research Projects - Thematic Grants