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Capillary electrophoretic study of interactions of metal ions with crown ethers, a sulfated beta-cyclodextrin, and zwitterionic buffers present as additives in the background electrolyte

Citation

Muzikar, M and Havel, J and Macka, M, Capillary electrophoretic study of interactions of metal ions with crown ethers, a sulfated beta-cyclodextrin, and zwitterionic buffers present as additives in the background electrolyte, Electrophoresis, 23, (12) pp. 1796-1802. ISSN 0173-0835 (2002) [Refereed Article]

DOI: doi:10.1002/1522-2683(200206)23:12<1796::AID-ELPS1796>3.0.CO;2-U

Abstract

Stability constants of K, Na, Ca, and Ba with 18-crown-6, K, Na, Li with sulfated β-cyclodextrin and K, Li, Ca, Mg, Sr, and Ba ions with ([2-hydroxy-1,1-bis(hydroxymethyl) ethyl]-amino)-1-propanesulfonic acid (TAPS) were determined by capillary electrophoresis and computed using a general least squares minimizing program CELET. The results for 18-crown-6 agreed well with those evaluated by graphical methods or reported in the literature. Previously unknown stability constants of sulfated β-cyclodextrins and TAPS determined for alkali and alkaline earth metals show that sulfated β-cyclodextrin interacts with monovalent metals allowing to manipulate their effective mobility. It interacts stronger with divalent metal cations. TAPS, as zwitterionic buffer widely used in various analytical, biochemical and other applications, forms complexes with alkali and alkaline earth cations, and although the stability constants are rather low, the equilibria should be taken into account when TAPS is used and metal cations are present in solution at the same time.

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:Havel, J (Professor Josef Havel)
Author:Macka, M (Professor Mirek Macka)
ID Code:25314
Year Published:2002
Web of Science® Times Cited:25
Deposited By:Chemistry
Deposited On:2002-08-01
Last Modified:2011-08-02
Downloads:0

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