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  • Interference of some matrix ions in cation-exchange chromatography
    Divjak, Blaž ...
    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-linearć 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 intožback 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.
    Vir: Journal of chromatography. A. - ISSN 0021-9673 (Vol. A 1008, no. 1, 2003, str. 89-96)
    Vrsta gradiva - članek, sestavni del
    Leto - 2003
    Jezik - angleški
    COBISS.SI-ID - 2910746

vir: Journal of chromatography. A. - ISSN 0021-9673 (Vol. A 1008, no. 1, 2003, str. 89-96)
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