Selective Sorption of Alkali-Metal Cations by Carboxylic Acid Resins Containing Acyclic or Cyclic Polyether Units

Takashi Hayashita, Mi Ja Goo, Jong Chan Lee, Jong Seung Kim, Jan Krzykawski, Richard A. Bartsch

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Novel ion-exchange resins have been prepared by condensation polymerization with formaldehyde In formic acid of three polyether carboxylic acids which possess two benzo group substituents. The selectivities and efficiencies of competitive alkali-metal cation sorption from aqueous solutions by these polyether carboxylic acid resins are strongly influenced by (1) the pH of the aqueous solution, (2) the acyclic or cyclic nature of the polyether unit, and (3) the conformational positioning of the carboxylic acid group In the resins derived from cyclic polyether (crown ether) compounds. Good sorption selectivity for Na+ was observed for dibenzo-16-crown-5 resin 3 in which the pendant carboxylic acid group is oriented over the polyether cavity. Resin 3 was utilized as a stationary phase for selective column concentration of Na+ from dilute aqueous solution.

Original languageEnglish
Pages (from-to)2283-2287
Number of pages5
JournalAnalytical chemistry
Issue number21
Publication statusPublished - 1990 Jan 15
Externally publishedYes


ASJC Scopus subject areas

  • Analytical Chemistry

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