A DC METHOD FOR THE ABSOLUTE DETERMINATION OF CONDUCTIVITIES OF THE PRIMARY STANDARD KCL SOLUTIONS FROM 0-DEGREES-C TO 50-DEGREES-C

被引：21

作者：

WU, YC ^{[1
]}

KOCH, WF ^{[1
]}

FENG, D ^{[1
]}

HOLLAND, LA ^{[1
]}

JUHASZ, E ^{[1
]}

ARVAY, E ^{[1
]}

TOMEK, A ^{[1
]}

机构：

[1] NATL OFF MEASURE, DEPT CHEM, BUDAPEST, HUNGARY

来源：

JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY | 1994年 / 99卷 / 03期

关键词：

ABSOLUTE MEASUREMENT; CONDUCTANCE; ELECTROLYTIC CONDUCTIVITY; POTASSIUM CHLORIDE; PRIMARY STANDARDS; RESISTANCE STANDARD;

D O I：

10.6028/jres.099.019

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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 this novel dc conductance cell are compared with the currently adopted IUPAC and OIML recommendations. In addition, measurements have been made of the electrolytic conductivity of a solution of potassium chloride having a molality of 1 mol/kg (mole KCl per kilogram H2O). The values so obtained over the temperature range of 0-degrees-C to 50-degrees-C arc recommended as the new primary standards for electrolytic conductivity.

引用

页码：241 / 246

页数：6

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