The heat effects of adsorption of ammonium and alkali, alkaline-earth, and transition metal cations on silica gel with covalently fixed polyaspartic acid were considered. The heats of adsorption of ammonium and alkali metal cations were determined with the use of 0.2 and 0.75 mM solutions of perchloric acid as eluents. The heats of adsorption of ammonium, and alkali metal cations on silica gel with covalently fixed polyaspartic acid with the use of a 0.2 mM solution of perchloric acid as eluent and ammonium, alkali, and alkaline-earth metal cations on Universal Cation and Selekton K adsorbents were determined with the use of a 2.75 mM solution of nitric acid as eluent. The retention mechanism was shown to be dominated by ion exchange on all adsorbents studied. Three types of dependences of cation retention on the temperature of the chromatographic column were found.

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:	Nesterenko, PN (Professor Pavel Nesterenko)
ID Code:	47531
Year Published:	2002
Web of Science® Times Cited:	9
Deposited By:	Chemistry
Deposited On:	2007-10-02
Last Modified:	2007-10-02
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