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Type: Artigo de periódico
Title: Electric Field-assisted Solid Phase Extraction: Study Of Electrochromatographic Parameters With An Anionic Model Compound
Author: Orlando
Ricardo M.; Rohwedder
Jarbas J. R.; Rath
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.
Subject: Performance Liquid-chromatography
Country: SAO PAULO
Rights: fechado
Identifier DOI: 10.5935/0103-5053.20140281
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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