Extraction across supported liquid membranes by use of electrical fields

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The method of electrokinetic migration that used electrical fields to extract supported liquid membranes (SLM) was demonstrated. Several hydrophobic basic drug substances were extracted protonated molecules from a 300 μL acidic sample solution through a SLM, consisting 15 μL 2-nitropheynl octyl ether (NPOE) into 30 μL 10 mmol L-1hydrochloric acid (HCL) as the acceptor solution, applying 300 V dc. The electrical potential difference was the force driving extraction of the charged analytes, without any pH gradient across the SLM. The use of electrical potential difference was found to be a significant driving force for SLM extraction a pH gradient. The kinetic advantage of using electrical field was found also found to be significant, when extractions were performed from small sample volumes.

Original languageEnglish
JournalAnalytical and Bioanalytical Chemistry
Volume388
Issue number3
Pages (from-to)521-523
Number of pages3
ISSN1618-2642
DOIs
Publication statusPublished - 1 Jun 2007

ID: 231651215