一种用于绝对测定0°C至50°C范围内一级标准KCl溶液电导率的直流方法。
A dc Method for the Absolute Determination of Conductivities of the Primary Standard KCl Solutions from 0 °C to 50 °C.
作者信息
Wu Y C, Koch W F, Feng D, Holland L A, Juhasz E, Arvay E, Tomek A
机构信息
National Institute of Standards and Technology, Gaithersburg, MD 20899-0001.
National Office of Measures, Budapest, Hungary.
出版信息
J Res Natl Inst Stand Technol. 1994 May-Jun;99(3):241-246. doi: 10.6028/jres.099.019.
A new method for the absolute determination of electrolytic conductivity based on direct current and Potentiometric measurements is described. The unique design of the cell uses a removable center section whose length and cross-sectional area are accurately known. Two pairs of matched Ag, AgCl electrodes are used in a four terminal mode of resistance measurement. Measurements of the electrolytic conductivity of primary standard potassium chloride solution using [his novel dc conductance cell are compared with the currently adopted IUPAC and OIML recommendations. In addition, measurements have heen made of the electrolytic conductivity of a solution of potassium chloride having a molality of 1 mol/kg (mole KCl per kilogram HO). The values so obtained over the temperature range of 0 °C to 50 °C are recommended as the new primary standards for electrolytic conductivity.
描述了一种基于直流和电位测量来绝对测定电解电导率的新方法。该电池的独特设计采用了一个可移除的中心部分，其长度和横截面积是精确已知的。两对匹配的银-氯化银电极用于四端电阻测量模式。使用这种新型直流电导池对初级标准氯化钾溶液的电解电导率测量结果与目前采用的国际纯粹与应用化学联合会（IUPAC）和国际法制计量组织（OIML）的建议进行了比较。此外，还对质量摩尔浓度为1 mol/kg（每千克水含1摩尔氯化钾）的氯化钾溶液的电解电导率进行了测量。在0°C至50°C温度范围内获得的值被推荐作为电解电导率的新初级标准。
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