A Simple and Sensitive Non Modified Acetylene Black-Polyurethane Composite Electrode in the Determination of Bisphenol-A in Water Samples

Author(s)

Rafael da Silva ^[1] ; Priscila Cervini ^[2] ; Éder T. G. Cavalheiro ^[3]

Affiliation

^[1] Universidade de São Paulo. Instituto de Química de São Carlos - Brasil

^[2] Universidade de São Paulo. Instituto de Química de São Carlos - Brasil

^[3] Universidade de São Paulo. Instituto de Química de São Carlos - Brasil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 35, n. 5 2024-02-26.

Abstract

A new composite based on acetylene black (AB) and vegetable derivative polyurethane (PU) was prepared and evaluated in the determination of bisphenol A (BPA) in water samples using a differential pulse voltammetric procedure (DPV). DPV pulse amplitude of 50 mV, 10 mV s-1 scan rate and 0.10 mol L-1 phosphate buffer were selected for the analytical studies. An analytical curve was obtained with linear range of 0.1-10 µmol L-1 BPA and a limit of detection of 14.1 nmol L-1. The proposed electrode was used without modifiers and with high sensitivity and low-cost preparation in the determination of BPA in both tap and artesian well waters spiked with 0.30 µmol L-1, with relative errors of 0.81 and 1.0% and recoveries of 102 and 105%, respectively. Interferences from oxytetracycline, furosemide, catechol, methyl viologen chloride and fenitrothion could be overcome by appropriate current measuring, while diclofenac did not interfere. (AU)

• FAPESP's process: 19/22217-8 - Thermoanalytical studies applied to antihepatitis and antiretroviral drugs of the protease inhibitor class: thermal behavior, decomposition intermediates, volatile characterization and polymorphism
• Grantee: Éder Tadeu Gomes Cavalheiro
• Support Opportunities: Regular Research Grants