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Ion chromatographic separation of anions and cations on poly(aspartic acid) functionalized silica
Citation
Kiseleva, MG and Kebets, PA and Nesterenko, PN, Ion chromatographic separation of anions and cations on poly(aspartic acid) functionalized silica, The Analyst, 126, (12) pp. 2119 -2123. ISSN 0003-2654 (2001) [Non Refereed Article]
DOI: doi:10.1039/b106283m
Abstract
Poly(aspartic acid)-silica (PolyCAT A), originally designed for the cation-exchange chromatography of proteins, is proposed for the simultaneous ion chromatographic separation of inorganic anions and cations. This is possible owing to the zwitterion-exchange properties of this stationary phase, which are attributed to the presence of both protonated aminopropyl and dissociated carboxylic groups in poly(aspartic acid) attached to the silica. The retention of alkali metal (Li+, Na+, K+), alkaline earth metal (Mg2+, Ca2+), ammonium and inorganic anions (Cl-, H2PO4-, Br-, NO2-, I-, IO3-, NO3-, ClO4-, SCN-) was tested in aqueous solutions of sulfuric, perchloric, sulfosalicylic, citric, oxalic, maleic and aspartic acids with conductimetric detection. The effect of eluent pH, together with the concentration and characteristics of the eluting ions, were studied. Under optimum conditions (0.3 mmol dm-3 H2SO4-0.2 mmol dm-3 Li2SO4 eluent), the simultaneous separation of three anions (CI-, H2PO4-, NO3-) and four cations (Na+, K+, Mg2+, Ca2+), on a PolyCAT A column (200 x 4.6 mm id, 5 μm film thickness) was achieved in 9 min.
Item Details
Item Type: | Non Refereed Article |
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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: | 46980 |
Year Published: | 2001 |
Web of Science® Times Cited: | 27 |
Deposited By: | Chemistry |
Deposited On: | 2007-09-25 |
Last Modified: | 2009-02-21 |
Downloads: | 0 |
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