痕量杂质离子对高纯水电导率的影响  

Influence of Trace Ionic Contaminants on Conductivity of High-Purity Water

作　　者：慕晓炜[1] 郑敏聪[1] 李建华[1] 

机构地区：[1]安徽省电力科学研究院,安徽合肥230601

出　　处：《净水技术》2013年第2期67-69,共3页Water Purification Technology

摘　　要：摘要该文介绍并分析了痕量杂质离子（Na＋、NH4＋-Cl-）对高纯水电导率的影响，结果表明温度为25℃且高纯水中仅存在0～0．88μg/L的Na＋时（除了水电离的H＋和OH-），水样的电导率会低于0．0548μS／cm的理论值；当Na＋含量为0．44μg／L时，电导率达到最小值0．0545μg／cm。可见高纯水中存在痕量Na＋电导率的影响甚微。如果高纯水中只存在有痕量NH却或Cl-时（除了水电离的H＋和OH-）并不会出现水样电导率低于理论值的情况。Influence of trace ionic contaminants, such as Na＋, NHI and CI-, on high-purity water conductivity was introduced in this paper. It is shown that high-purity water only containing less than 0.88 μg/L Na＋ （except H＋ and OH- ionized by water） can make sample conductivity be slightly below the theoretical value. The minimum value is 0.054 5 μS/cm when water contains 0.44 μg/L Na＋. It can be seen trace Na＋ in pure water has little effect on the conductivity. But if high-purity water only contain ammonium or chloride （except the H＋ and OH- ionized by water）, sample conductivity will not be below the theoretical value.

关 键 词：高纯水 痕量杂质离子 钠离子(Na+) 电导率 理论值 

分 类 号：TM621[电气工程—电力系统及自动化]