| 镉离子选择电极电位滴定测定钙镁 |
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| 引用本文： | 冯正光 但德忠. 镉离子选择电极电位滴定测定钙镁[J]. 理化检验(化学分册), 1996, 32(6): 343-345,347 |
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| 作者姓名： | 冯正光 但德忠 |
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| 作者单位： | [1]成都理工学院应化系 [2]四川联合大学环境系 |
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| 摘 要： | 建立了以镉离子选择电极极作指示电极ＥＤＴＡ、ＥＧＴＡ电位滴定测定钙、镁的方法，详细考察了电位滴定的适宜条件，干扰离子的影响及消除办法。在四硼酸钠－氢氧化钠缓冲介质中，ＥＧＴＡ滴定钙，ＥＤＴＡ滴定钙镁含量，测定矿泉水及硅酸盐样品中钙镁含量，结果符合要求。
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| 关 键 词： | 电位滴定 钙 镁 镉离子选择电极 |
POTENTIOMETRIC TITRTION OF CALCIUM AND MAGNESIUM USING CADMIUM ION SELECTIVE ELECTRODE AS INDICATING ELECTRODE |
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| Feng Zhengguang. POTENTIOMETRIC TITRTION OF CALCIUM AND MAGNESIUM USING CADMIUM ION SELECTIVE ELECTRODE AS INDICATING ELECTRODE[J]. Physical Testing and Chemical Analysis Part B:Chemical Analgsis, 1996, 32(6): 343-345,347 |
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| Authors: | Feng Zhengguang |
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| Abstract: | The method for the titration of mixtures containing calcium and magnesium with cadmium ion selective electrode as a indicating electrode, based on the difference in the formatiom constants of their complexs with EDTA and EGTA, was established. Calcium is titrated in the presence of magnesium with EGTA in buffer solution of Na2B4O7-NaOH(pH 10) ,and the total calcium and magnesium is determined in same buffer solution. The samples of natural spring water and silicates were analyzed by the proposed method with satisfactory results. |
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| Keywords: | Potential titration Calcium Magnesium Cadmium ion selective electrode |
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