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A new and selective capillary column coated with cationic diazacrown ether for separation of organic and inorganic anions by capillary electrophoresis
Citation
Mori, M and Tsue, H and Tanaka, S and Tanaka, K and Haddad, PR, A new and selective capillary column coated with cationic diazacrown ether for separation of organic and inorganic anions by capillary electrophoresis, Electrophoresis, 24, (12-13) pp. 1944-1950. ISSN 0173-0835 (2003) [Refereed Article]
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Copyright Statement
The definitive published version is available online at: http://interscience.wiley.com
Official URL: http://interscience.wiley.com
DOI: doi:10.1002/elps.200305503
Abstract
A new coated capillary has been introduced for capillary electrophoretic separation
of anions by using a positively charged diazacrown ether with a 12-membered ring.
A positive charge spread over the inner capillary surface led to a substantial anodic
electroosmotic flow (EOF) over the range of migrating buffer of pH 2–11. Under
the optimum conditions of 25 mM phosphate buffer at pH 7, the diazacrown-coated
capillary showed a successful simultaneous separation of 7 inorganic anions and
13 aromatic anions (including positional isomers) in less than 15 min. The migration
times of the sample anions and EOF marker for consecutive runs on a single column
were highly reproducible, giving a relative standard deviation of 1%. Theoretical
treatment of the migration behavior clearly demonstrated that ion association between
the diazacrown and analyte anions is strongly dependent on the nature of
the functional groups of anions (e.g., sulfonate groups carboxyl groups) and the
number of negative charges (e.g., trivalent anions divalent anions monovalent
anions) on the analyte.
Item Details
Item Type: | Refereed Article |
---|---|
Research Division: | Chemical Sciences |
Research Group: | Analytical chemistry |
Research Field: | Separation science |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the chemical sciences |
UTAS Author: | Tanaka, K (Dr Kazuhiko Tanaka) |
UTAS Author: | Haddad, PR (Professor Paul Haddad) |
ID Code: | 27342 |
Year Published: | 2003 |
Web of Science® Times Cited: | 9 |
Deposited By: | Chemistry |
Deposited On: | 2003-08-01 |
Last Modified: | 2010-02-02 |
Downloads: | 0 |
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