低压离子色谱法测定 Mg^(2+)和 Ca^(2+) 离子

Analysis of Mg2+ and Ca2+ Lons in Water byLow Pressure Lon Chromatography

用低压离子色谱法测定水中的Ｍｇ２＋和Ｃａ２＋离子，Ｍｇ２＋离子在０～１０μｇ／ｍＬ，Ｃａ２＋在０～１２．５μｇ／ｍＬ浓度范围内，分别与其色谱峰具有良好的线性关系。Ｍｇ２＋和Ｃａ２＋离子的检测限分别为０．１７３μｇ／ｍＬ和０．２７５μｇ／ｍＬ，其相对标准偏差分别为１．３２％和３．６４％，回收率分别为９０．８％和１０１．３％。该方法快速、准确，适用于环境水样及放射性水样中Ｍｇ２＋和Ｃａ２＋离子的分析。

g2+ and Ca2+ ions in water are analyzed by low pressure ion chromatography.The results show that the concentration of Mg2+ and Ca2+ ions are linear with peaks of their chromatography in the range of 0～10μg/mL and 0～12.5μ/mL respectively and the minimum detectable concentration are 0.173μg/mL and 0.275μg/mL for Mg2+ and Ca2+ ions separately while relative standard deviations are 1.32% and 3.64% and the recovery rate are 90.8% and 101.3% respectively.The method is rapid and reliable.It can be applied to the measurement of Mg2+ and Ca2+ ions in water.