Spectrofluorimetric determination of bisphenol A in tap waters by exploiting liquid-liquid microextraction in a sequential injection system

Autor(es)

Nascimento, Carina F. ^[1] ; Rocha, Fabio R. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Energia Nucl Agr, POB 96, BR-13400970 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Microchemical Journal; v. 137, p. 429-434, MAR 2018.
• Citações Web of Science: 2

Resumo

Bisphenol A (BPA) is an emerging pollutant with estrogenic effects for humans. Relatively high concentrations (mu g L-1 range) have been found in tap waters in some countries, thus requiring fast and reliable procedures for its monitoring. In this work, a flow-based liquid-liquid microextraction procedure is proposed for preconcentration and separation of BPA, aiming at the determination based on its native fluorescence, which significantly increases in organic medium. Extraction was carried out in a sequential injection system by means of a film or the extractor formed on the tube walls (wetting film approach), followed by elution of this phase by ethanol. In this way, an enrichment factor of 15.5 was achieved with only 1.5 mL of sample and 30 mu L of the extractor solvent. A linear response was observed from 5.0 to 100 mu g L(-)1 with a detection limit of 1.8 mu g L-1, sampling rate of 10 h(-1), and coefficient of variation of 2.3% (n = 10). The procedure was successfully applied to tap water samples and the results agreed with those obtained by the HPLC reference method. (C) 2017 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 11/23498-9 - Sistemas avançados de análises químicas em fluxo: aplicações nas áreas tecnológica, agronômica e ambiental
• Beneficiário: Elias Ayres Guidetti Zagatto
• Modalidade de apoio: Auxílio à Pesquisa - Temático