| 容量法测定水质总硬度时对分析结果误差的分析 |
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| 引用本文： | 董明,刘玲.容量法测定水质总硬度时对分析结果误差的分析[J].昆明冶金高等专科学校学报,1996,12(4):58-61. |
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| 作者姓名： | 董明 刘玲 |
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| 作者单位： | [1]昆明冶金高等专科学校实践科，昆明650033 [2]云南师范大学化学系，昆明650092 |
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| 摘 要： | EDTA络合滴定法测定水质总硬度、常规使用的指示剂——EBT指示剂和K-B指示剂对Ca^2 、Mg^2 两离子的显示灵敏度差异较大，故在分析中会造成系统误差通过我们的多次实验和实践使用Cu-PA指示剂得到的分析结果位于常规指示剂带来的正偏差和负偏差之间，这是因为Cu-PAU指示剂对Ca^2 、Mg^2 两离子的显示灵敏度差异较小的原故。
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| 关 键 词： | 分析结果 水质 总硬度 Mg^2＋ 测定 指示剂 离子 正偏差 误差 负偏差 |
Analysis of the Error of Result by Volumetry in Determination of Total Water Hardness |
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| Dong Ming Liu Ling.Analysis of the Error of Result by Volumetry in Determination of Total Water Hardness[J].Journal of Kunming Metallurgy College,1996,12(4):58-61. |
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| Authors: | Dong Ming Liu Ling |
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| Abstract: | This paper reports determination of total water hardness with EDTA-Chelometry. There is so significant difference in determination of Ca~(++)and Mg~(++) sensibility by routine EBT and K-B indicator that can induce systematic error in analysis. From our much practice and experiment, we find that the analytical result by Cu-PAU indicator. Because this is Cu-PAU indicator shows a minor sensibility difference in determination of Ca~(++)and Mg~(++). |
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| Keywords: | Acid-base capacity Indicator sensibility Equivalent point |
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