Tanaka K, Ohta K, Haddad P R, Fritz J S
National Industrial Research Institute of Nagoya, Japan.
J Chromatogr A. 1998 Apr 24;804(1-2):179-86. doi: 10.1016/s0021-9673(98)00031-4.
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 with polymethacrylate-based weakly acidic cation-exchange resin in the H+ form (Tosoh TSKgel OA-PAK-A, 300 mm x 7.8 mm I.D.). An eluent comprising a strong acid, a weak organic acid, methanol and water is used. Using 0.75 mM sulfuric acid, 2 mM tartaric acid, 7.5% (v/v) methanol in water as eluent, the monovalent cations (Na+, NH4+, and K+) and divalent cations (Mg2+ and Ca2+) were separated simultaneously by a cation-exchange mechanism in about 25 min. The application of this method to the analysis of several natural waters including rain, river, lake, underground and forest soil waters for estimating acid rain effects on the natural and urban environments is presented.
研究了采用填充H⁺型聚甲基丙烯酸酯基弱酸性阳离子交换树脂的阴离子排斥色谱柱（Tosoh TSKgel OA-PAK-A，300 mm×7.8 mm内径），结合间接电导检测的离子交换色谱法同时测定一价和二价阳离子。使用了一种由强酸、弱酸、甲醇和水组成的洗脱液。以0.75 mM硫酸、2 mM酒石酸、7.5%（v/v）甲醇的水溶液作为洗脱液，通过阳离子交换机制在约25分钟内同时分离了一价阳离子（Na⁺、NH₄⁺和K⁺）和二价阳离子（Mg²⁺和Ca²⁺）。介绍了该方法在分析包括雨水、河水、湖水、地下水和森林土壤水在内的几种天然水以评估酸雨对自然和城市环境影响方面的应用。
