Simultaneous Ion Chromatographic Determination of Weakly and Strongly Retained Inorganic Anions using Aminoacids as Eluents

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Abstract
At present eluents that are most widely used in ion chromatography of inorganic anions are salts with carbonate and hydroxyl eluting ions. But these eluents appear to be of no efficiency when samples containing both weakly and strongly retained inorganic anions are to be analyzed. In this case, one should use either expensive and complicated gradient elution technique or double injection with different eluents separately for weakly and strongly retained anions. In this work, the simultaneous ion chromatographic determination of weakly and strongly retained inorganic anions without gradient elution is considered. The most common eluent for ion chromatography of anions, carbonate and aminoacids are compared. Dependence of the chromatographic behaviour of the strongly retained inorganic anions upon the concentration of the organic components in the eluent is shown.