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Abstract

Ion-exclusion chromatography (IEC) has been widely used in
the separation of carboxylic acids, finding applications in the
analysis of food and beverages, pharmaceuticals, biological
samples, and acid rain samples.' The retention mechanism of
carboxylic acids in ion-exclusion chromatography has also been
investigated in many studies, and the factors which affect
retention can be divided into three categories: analyte effects,
mobile phase effects, and stationary phase effects.
In IEC, the chromatographic system can be considered to
consist of three phases: the mobile phase which comprises the
eluent passing through the interstitial volume of the column, the
stationary phase which comprises the occluded liquid trapped
within the pores of the resin and the resin phase which is the
solid resin network and functionalized groups.' In this mode of
chromatography, the analytes being separated have the same
charge as the functional group on the resin; that is, anions are
separated on cation-exchange columns and cations are separated
on anion-exchangec columns.

Item Type:	Article
Authors/Creators:	Ng, KL and Dicinoski, GW and Haddad, PR
Keywords:	Exchange capacity ; Binding capacity ; Chromatographic retention ; Chromatographic properties ; Benzene(divinyl) polymer ; Styrene derivative polymer ; Bonded stationary phase ; Ion chromatography ; Dicarboxylic acid ; Carboxylic acid ; Separation method ; Analysis method ;
Journal or Publication Title:	Analytical Sciences
ISSN:	0910-6340
Additional Information:	Copyright © 2001 Japanese Society for Analytical Chemistry
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