eCite Digital Repository

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]


Preview
PDF
Restricted - Request a copy
194Kb
  

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 211. 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
Author:Tanaka, K (Dr Kazuhiko Tanaka)
Author:Haddad, PR (Professor Paul Haddad)
ID Code:27342
Year Published:2003
Web of Science® Times Cited:8
Deposited By:Chemistry
Deposited On:2003-08-01
Last Modified:2010-02-02
Downloads:0

Repository Staff Only: item control page