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

Autor(es)

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

Afiliação do(s) autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 26, n. 2, p. 310-318, FEB 2015.
• Citações Web of Science: 4

Resumo

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)

• Processo FAPESP: 08/03064-1 - Aplicação de potenciais elétricos em procedimentos de extração em fase sólida
• Beneficiário: Susanne Rath
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 07/07079-0 - Aplicação de potenciais elétricos em procedimentos de extração em fase sólida
• Beneficiário: Ricardo Mathias Orlando
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 08/57808-1 - Instituto Nacional de Ciências e Tecnologias Analíticas Avançadas - INCTAA
• Beneficiário: Celio Pasquini
• Modalidade de apoio: Auxílio à Pesquisa - Temático