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本文采用离子色谱法(IC)测定高纯度工业氢氧化钾中钠、钙、镁杂质离子的含量。采用DionexACS1500型离子色谱仪,IonPacCS12A阳离子分离柱,用0.02mol/L甲基磺酸溶液为淋洗液,流速1.8ml/min,所含钠、钙、镁杂质离子得到很好的分离,利用峰面积对浓度的线性关系定量,效果良好。本法可以一次性同时检出需要严控的三种杂质离子,操作简单方便,灵敏度高、准确度好。
In this paper, ion chromatography (IC) determination of high purity industrial potassium hydroxide in sodium, calcium and magnesium impurity ions. Using DionexACS1500 ion chromatography, IonPacCS12A cation separation column, with 0.02mol / L methanesulfonic acid solution as eluent, the flow rate of 1.8ml / min, containing sodium, calcium and magnesium impurity ions were well separated, the use of peaks The linear relationship between area and concentration was quantitative and the effect was good. This method can simultaneously detect the three kinds of impurity ions that need to be strictly controlled at the same time. It is simple and convenient to operate, has high sensitivity and good accuracy.