Flow-based determination of lead exploiting in-syringe dispersive liquid-liquid micro-extraction in xylene and integrated spectrophotometric detection

Autor(es)

Santos, Felisberto Goncalves ; Maya, Fernando ; dos Reis, Boaventura Freire ; Guidetti Zagatto, Elias Ayres ; Cerda, Victor

• Tipo de documento: Artigo Científico
• Fonte: Talanta; v. 247, p. 6-pg., 2022-09-01.

Resumo

A lab-in-syringe flow system exploiting dispersive liquid-liquid micro-extraction in a solvent lighter than water is proposed for the spectrophotometric determination of lead in industrial residual waters. The steps inherent to both liquid-liquid extraction and monitoring of the formed compound are in-syringe carried out. The classical carbon tetrachloride is not used as the extracting solvent, as it does not present the friendly characteristics inherent to the Green Analytical Chemistry. Aiming at a cleaner alternative for this determination, xylene is selected. Enrichment factor, linear dynamic range, detection limit, sample throughput and residue volume inherent to the proposed procedure were estimated as 36, 50.0-250 mu g L-1, 9.0 mu g L-1, 13 h(-1), and 2.0 mL, respectively. (AU)

• Processo FAPESP: 13/05728-2 - Desenvolvimento de dispositivo para propulsão de fluído e módulo de análise com habilidade para implementar os processos de análise por injeção sequencial e multicomutação em análise em fluxo
• Beneficiário: Felisberto Gonçalves Santos Junior
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/22520-9 - Microextração líquido-líquido dispersiva usando multi-seringa e detecção espectrofotométrica para a determinação de chumbo em plantas e água
• Beneficiário: Felisberto Gonçalves Santos Junior
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado