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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kubán, Pavel Bocek, Petr |
| Description | Author Affiliation: Kubán P ( Institute of Analytical Chemistry of the Czech Academy of Sciences, v. v. i., Veverí 97, CZ-60200 Brno, Czech Republic. Electronic address: kuban@iach.cz.); Bocek P ( Institute of Analytical Chemistry of the Czech Academy of Sciences, v. v. i., Veverí 97, CZ-60200 Brno, Czech Republic.) |
| Abstract | Micro-electromembrane extractions (µ-EMEs) across free liquid membranes (FLMs) were applied to simultaneous extractions of anions and cations. A transparent narrow-bore polymeric tubing was filled with adjacent plugs of µL volumes of aqueous and organic solutions, which formed a stable five-phase µ-EME system. For the simultaneous µ-EMEs of anions and cations, aqueous donor solution was the central phase, which was sandwiched between two organic FLMs and two aqueous acceptor solutions. On application of electric potential, anions and cations in the donor solution migrated across the two FLMs and into the two peripheral acceptor solutions in the direction of anode and cathode, respectively. Visual monitoring of anionic (tartrazine) and cationic (phenosafranine) dye confirmed their simultaneous µ-EMEs and their rapid (in less than 5 min) transfers into anolyte and catholyte, respectively. The concept of simultaneous µ-EMEs was further examined with selected model analytes; KClO4 was used for µ-EMEs of inorganic anions and cations and ibuprofen and procaine for µ-EMEs of acidic and basic drugs. Quantitative analyses of the resulting acceptor solutions were carried out by capillary electrophoresis with capacitively coupled contactless conductivity detection (CE-C(4)D). Good extraction recoveries (91-94%) and repeatability of peak areas (≤6.3%) were achieved for 5 min µ-EMEs of K(+) and ClO4(-). Extraction recoveries and repeatability of peak areas for 5 min µ-EMEs of ibuprofen and procaine were also satisfactory and ranged from 35 to 63% and 7.6 to 11.3%, respectively. Suitability of the presented micro-extraction procedure was further demonstrated on simultaneous µ-EMEs with subsequent CE-C(4)D of ibuprofen and procaine from undiluted human urine samples. |
| File Format | HTM / HTML |
| ISSN | 00032670 |
| Volume Number | 908 |
| e-ISSN | 18734324 |
| Journal | Analytica Chimica Acta |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-02-18 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Analytical Discipline Chemistry Coloring Agents Isolation & Purification Membranes, Artificial Anions Cations Electrophoresis, Capillary Reference Standards Solutions Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Environmental Chemistry Analytical Chemistry Biochemistry |
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