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Interference of some matrix ions in cation-exchange chromatography
Citation
Divjak, B and Goessler, W and Haddad, PR and Novic, M, Interference of some matrix ions in cation-exchange chromatography, Journal of Chromatography A, 1008, (1) pp. 89-96. ISSN 0021-9673 (2003) [Refereed Article]
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DOI: doi:10.1016 /S0021-9673(03)00976-2
Abstract
Ion chromatographic analysis of ions in samples containing complex matrix composition strongly depends on the on-column co-processes caused by sample matrix components. In the present publication studies of different separation phenomena in cation-exchange chromatography are described. The studies were performed at ‘non-linear’ chromatographic conditions, when the concentration of matrix (interfering) ions significantly exceeded the concentration of the eluent ions. During the research work, the processes already identified in anion-exchange chromatography, i.e. self-elution, on-column change of the eluent and sample-induced micro-gradient elution were used to explain the chromatographic behavior of alkaline and earth-alkaline cations when samples with high matrix cation concentration were analyzed. When present at higher concentrations, the ammonium cation was found to cause self-elution (NH4+ fraction) as well as on-column eluent neutralization due to its ability to diffuse into/back from the porous core of the stationary phase (NH3 fraction). Co-elution of a matrix component and analytes of interest caused spectroscopic interferences that additionally influenced the peak shape of each individual analyte
Item Details
Item Type: | Refereed Article |
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Keywords: | Alkaline metals; Alkaline earth metals; Inorganic cations |
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: | Haddad, PR (Professor Paul Haddad) |
ID Code: | 27355 |
Year Published: | 2003 |
Web of Science® Times Cited: | 3 |
Deposited By: | Chemistry |
Deposited On: | 2003-08-01 |
Last Modified: | 2010-02-05 |
Downloads: | 0 |
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