Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0021-9673(02)01844-7
Title: 1,3-Dialkylimidazolium-based room-temperature ionic liquids as background electrolyte and coating material in aqueous capillary electrophoresis
Authors: Qin, W.
Wei, H.
Li, S.F.Y. 
Keywords: Alkali metals
Alkaline-earth metals
Background electrolyte composition
Coated capillaries
Dialkylimidazolium
Ionic liquids
Metal cations
Room-temperature ionic liquids
Issue Date: 24-Jan-2003
Citation: Qin, W., Wei, H., Li, S.F.Y. (2003-01-24). 1,3-Dialkylimidazolium-based room-temperature ionic liquids as background electrolyte and coating material in aqueous capillary electrophoresis. Journal of Chromatography A 985 (1-2) : 447-454. ScholarBank@NUS Repository. https://doi.org/10.1016/S0021-9673(02)01844-7
Abstract: The 1-ethyl-3-methylimidazolium (EMIM) cation was found to have constant mobility of 4.5×10-4 cm2 V-1 s-1 over the pH range of 3 to 11. The electroosmotic flow of bare silica capillary was reversed by the covalently bonded room-temperature ionic liquid (RTIL) coating. With run buffer of 5 mM EMIM (pH 8.5), NH4 + in human urine was separated from the K+ matrix and was detected to be 0.37±0.012%. K+, Na+, Li+, Ca2+, Mg2+, and Ba2+ were baseline separated in RTIL-coated capillary with run buffer of 10 mM EMIMOH-acetic acid at pH 5, and the concentration of the above ions in a red wine were detected to be 907, 27.9, 0, 71.0, 83.4 and 31.1 μg/ml, respectively. The RTIL-coated capillary showed stable electroosmotic flow for at least 80 h in the run buffer. © 2002 Elsevier Science B.V. All rights reserved.
Source Title: Journal of Chromatography A
URI: http://scholarbank.nus.edu.sg/handle/10635/95436
ISSN: 00219673
DOI: 10.1016/S0021-9673(02)01844-7
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