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An investigation was carried out into the fast determination of five homologue imidazolium cations in ionic liquids by ion chromatography using a cation-exchange column and direct conductivity detection. Ethylenediamine, complex organic acid (citric acid, oxalic acid and tartaric acid) and organic modifiers (acetonitrile) were used as mobile phase. The influences of the eluent types, eluent concentration,...
Ion-interaction chromatography with direct conductivity detection has been used for analysis of nitrate and nitrite. Chromatographic separation was performed on a monolithic silica-based C18 column dynamically modified with tetrabutylammonium (TBA+). Using the optimized mobile phase, containing 2.0 mmol L−1 TBA+ and 0.8 mmol L−1 citrate (pH 6.0), delivered at a flow rate of 6.0 mL min−1, separation...
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