天然水中钙、镁离子的测定

Determination of Ca 2+ and Mg 2+ in Natural Water

对Ｃａ２＋、Ｍｇ２＋在含２×１０３ｍｏｌ／ＬＥＤＴＡ和１５×１０２ｍｏｌ／Ｌ硼砂载体溶液中的毛细管电泳行为进行了讨论，并在２００ｎｍ、３５℃、２０ｋＶ的优化条件下，５ｍｉｎ内对天然水中的Ｃａ２＋、Ｍｇ２＋离子进行了同时定量，为分析水质硬度提供了一种高效、快速的测定方法。

The capillary behaviour of Ca 2+ and Mg 2+ in supporting electrolyte of 2×10 3 mol/L EDTA and 1 5×10 2 mol/L borax was studied by high performance capillary electrophoresis.Under the optimun conditions of 200 nm,35℃ and 20 kV,Ca 2+ and Mg 2+ in the natural water were simultaneously determined in 5 min.A rapid and effective determination method was acquired for analysis of water quality.