Electric Field-Assisted Solid Phase Extraction: Study of Electrochromatographic Parameters with an Anionic Model Compound

Author(s)

Orlando, Ricardo M. ^[1] ; Rohwedder, Jarbas J. R. ^[1] ; Rath, Susanne ^[1]

Affiliation

^[1] Univ Estadual Campinas, Inst Chem, Dept Analyt Chem, BR-13084971 Campinas, SP - Brazil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 26, n. 2, p. 310-318, FEB 2015.
• Web of Science Citations: 4

Abstract

Electric field-assisted solid phase extraction using syringe type cartridges (E-SPE) is a recent approach with a high capacity to obtain differential selectivity and/or recovery in comparison with conventional solid phase extraction (SPE). In this work, E-SPE was employed for the extraction of the anionic dye sunset yellow. During the washing step the electric field was evaluated with the top electrode negatively (E-SPE(-/+)) or positively charged (E-SPE(+/-)) and the results were compared with conventional SPE to understand how the electrochromatographic parameters can influence the recovery of the dye. Using the E-SPE(-/+) the electric field can increase the elution of the dye from the cartridge by over 57-fold. This notable result can be attributed to the electrophoretic velocity of the dye in the direction of the flow rate of the eluent. These results demonstrated that E-SPE is an interesting approach to elute ionic compounds with reduced volumes of eluent or less amount of organic solvent. (AU)

• FAPESP's process: 07/07079-0 - Application of electric potentials in procedures of solid phase extration
• Grantee: Ricardo Mathias Orlando
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 08/03064-1 - Application of electric potential in solid phase extraction procedures
• Grantee: Susanne Rath
• Support type: Regular Research Grants
• FAPESP's process: 08/57808-1 - National Institute of Advanced Analytical Science and Technology
• Grantee: Celio Pasquini
• Support type: Research Projects - Thematic Grants