Published:Journal of Chromatographic Science,
ISSN 0021-9665 Volume
47, Number 7, August 2009, pp. 510-515
Anion Separation and Preconcentration with Cyclen
and Cyclen-Resorcinarene Derivatives
Jing Wang, Roger G. Harrison, and John D. Lamb
Department of Chemistry and Biochemistry, Brigham Young University,
Provo, UT 84602-5700
N-undecyl cyclen and a resorcinarene bowl bearing
four cyclen arms have been applied as anion exchangers in ion
chromatography by strong adsorption to a reversed-phase column.
The column loaded with the resorcinarene bowl cyclen tetramer
exhibited significantly better performance in anion separation
than that with N-undecyl cyclen monomer in isocratic elution
mode. Both columns were tested for polarizable anion preconcentration
or removal. By changing the eluent type from sodium bicarbonate
to sodium hydroxide, the degree of protonation of the cyclen
molecules could be modified, and the column capacity for anion
retention adjusted thereby. Capacity gradient elution was successfully
applied to removing sample matrix ions in the preconcentration
of perchlorate and perrhenate ions as example analytes.
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