Please use this identifier to cite or link to this item:
|dc.title||Determination of ammonium and metal ions by capillary electrophoresis- potential gradient detection using ionic liquid as background electrolyte and covalent coating reagent|
|dc.identifier.citation||Qin, W., Li, S.F.Y. (2004-09-10). Determination of ammonium and metal ions by capillary electrophoresis- potential gradient detection using ionic liquid as background electrolyte and covalent coating reagent. Journal of Chromatography A 1048 (2) : 253-256. ScholarBank@NUS Repository. https://doi.org/10.1016/j.chroma.2004.07.048|
|dc.description.abstract||A capillary zone electrophoresis (CZE)-potential gradient detection (PGD) method coupled with field-amplified sample injection was developed to determine alkali metal, alkaline-earth metal, nickel, lead and ammonium ions. The capillary surface was coated with dialkylimidazolium-based ionic liquid and thus the electroosmotic flow (EOF) of the capillary was reversed. The buffer composed of 7.5 mM lactic acid, 0.6 mM 18-crown-6, 12 mM α-cyclodextrin (α-CD); it was adjusted to pH 4.0 by 1-hexyl-3-methylimidazolium hydroxide. The 11 cations were baseline separated within 14 min with 5.1-18.9·10 4 plates (for 40-cm-long capillary) in separation efficiency, and the detection limits were in the range of 0.27-7.3 ng/ml. The method showed good reproducibility in terms of migration time with RSD ≤ 0.90% for run-to-run and ≤1.65 for day-to-day assessment. © 2004 Elsevier B.V. All rights reserved.|
|dc.subject||Capillary zone electrophoresis|
|dc.description.sourcetitle||Journal of Chromatography A|
|Appears in Collections:||Staff Publications|
Show simple item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.