Ion-exchange chromatography of mono- and divalent cations in natural waters on a weak-acid anion-exclusion column

摘要: Ion-exchange chromatography with indirect conductimetric detection for the simultaneous determination of mono- and divalent cations is investigated using an anion-exclusion chromatographic column packed polymethacrylate-based weakly acidic cation-exchange resin in H+ form (Tosoh TSKgel OA-PAK-A, 300 mm×7.8 mm I.D.). An eluent comprising a strong acid, weak organic methanol water used. Using 0.75 mM sulfuric 2 tartaric 7.5% (v/v) as eluent, monovalent (Na+, NH4+, K+) (Mg2+ Ca2+) were separated simultaneously by mechanism about 25 min. The application this method to analysis several natural waters including rain, river, lake, underground forest soil estimating acid rain effects on urban environments presented.