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

Author(s)

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

• Document type: Journal article
• Source: Talanta; v. 247, p. 6-pg., 2022-09-01.

Abstract

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)

• FAPESP's process: 13/05728-2 - Development of fluid propelling device and flow analysis module with ability to implement the processes of sequential injection analysis and multicommutation flow analysis
• Grantee: Felisberto Gonçalves Santos Junior
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 14/22520-9 - Dispersive liquid-liquid microextraction using multi-syringe and spectrophotometric detection for determination of lead in plants and water
• Grantee: Felisberto Gonçalves Santos Junior
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate