| 容量法测定水样中硫酸根 |
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| 引用本文： | 刘汉初 倪桃英. 容量法测定水样中硫酸根[J]. 岩矿测试, 1991, 10(2): 123-124 |
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| 作者姓名： | 刘汉初 倪桃英 |
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| 作者单位： | 湖南常德市环境监测站 415003(刘汉初)，湖南常德市环境监测站 415003(倪桃英) |
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| 摘 要： | 本文对EDTA滴定过量Pb间接测定SO_4~(2-)的方法作了改进。加入乙醇抑制PbSO_4沉淀的溶解,使滴定不需分离沉淀而直接进行。用六次甲基四胺调节控制pH为5.2—5.4,可避免大量共存Ca~(2+)、Mg~(2+)的干扰。改进后的方法简单、快速,准确度和精密度均好,可适用SO_4~(2-)含量高于1mg/L的天然水分析。
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| 关 键 词： | 硫酸根 测定 熵定 |
Volumetric Determination of Sulfata in Water |
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| Liu Hanchu and Ni Taoying. Volumetric Determination of Sulfata in Water[J]. Rock and Mineral Analysis, 1991, 10(2): 123-124 |
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| Authors: | Liu Hanchu and Ni Taoying |
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| Abstract: | A modification of the complexometric titration for the determination of SO42- in water was suggested. 20 ml of absolute alcohol was added to 50 ml of water sample to prevent the dissolution of lead sulfate and the separation of the precipitate was obviated for the titration. Interferences of Ca2+ and Mg2+ were suppressed by adjusting the pH to 5.2-5.4 with hexamethylenetramine. |
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| Keywords: | sulfate determination volumetry water analysis. |
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