Simultaneous ion-exclusion chromatography-cation-exchange chromatography with conductimetric detection of anions and cations in acid rain waters

摘要: Abstract A simple, selective and sensitive method was investigated for simultaneously determining anions (Cl−, NO3−, SO42−) cations (Na+, NH4+, K+, Mg2+, Ca2+) in acid rain related environmental waters central Japan. The involves simultaneous ion-exclusion-cation-exchange chromatography with conductimetric detection on a polyacrylate weakly acidic cation-exchange resin column weak-acid eluent. With the eluent (tartaric acid) both were separated simultaneously, based ion-exclusion mechanism. Owing to presence of H+ ions tartaric eluent, detector response positive negative cations. Using 5 mM acid-7.5% methanol-water good separation achieved about 30 min. results indicated an ionic balance 100% between (including HCO3−) H+).