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-form and a weak-acid eluent. When using only a 1.4 mMsulfosalicylic acid/6 mM 18-crown-6 ether as an eluent, good resolution of both anions and cations, minimumtime required for the separation, and satisfactory detection sensitivity were obtained in a reasonable time. Themethod was successfully applied to the simultaneous determination of anions and cations in natural waters.Key Words : Ion-exclusion/cation-exchange chromatography, Weakly acidic cation-exchange resin, Simulta-neous determination of anions and cationsIntroductionIon chromatography has been recognized as a usefulapproach for the determination of anions and/or cations inmany types of natural waters such as acid rains.

bulletin of the korean chemical society

Simultaneous Determination of Anions and Cations in Natural Water by Ion-exclusion/Cation-exchange Chromatography with a Weakly Acidic Cation-exchange Resin Column