论文信息 - Primary methods for the measurement of electrolytic conductivity

Primary methods for the measurement of electrolytic conductivity

This paper surveys the state of the art for primary methods for the evaluation of electrolytic conductivity in aqueous solutions as they are currently carried out in several national metrological institutes (NMIs). The theoretical and practical basic knowledge of this measurement is described. Analysis of and comments on the different approaches are offered to give emphasis to technical difficulties and possible solutions. Further development is foreseeable, ensuring a common effort for the sharing of expertise that has been undertaken at the NMIs. In particular, improvements are expected towards traceable measurements of solutions with conductivity values lower than those actually standardized, down to the level of ultrapure water.

[1] S. A. Zavidonova. International Organization of Legal Metrology , 1968 .

[2] J. S. rensen,et al. International comparison of electrolytic conductivity between the DFM (Denmark), the NIST (USA), and the OMH (Hungary) , 2001 .

[3] Grinnell Jones,et al. The Measurement of the Conductance of Electrolytes. VI. Galvanic Polarization by Alternating Current , 1935 .

[4] Guk-Rwang Won. American Society for Testing and Materials , 1987 .

[5] Grinnell. Jones,et al. The Measurement of the Conductance of Electrolytes. V. A Redetermination of the Conductance of Standard Potassium Chloride Solutions in Absolute Units , 1933 .

[6] Y. C. Wu,et al. A dc method for the absolute determination of conductivities of the primary standard KCl solutions from 0-degrees-C to 50-degrees-C , 1994 .

[7] K. W. Pratt,et al. Proposed New Electrolytic Conductivity Primary Standards for KCl Solutions , 1991, Journal of research of the National Institute of Standards and Technology.

[8] P. A. Berezansky,et al. Low Electrolytic Conductivity Standards , 1995, Journal of research of the National Institute of Standards and Technology.

[9] Y. C. Wu,et al. Molality-based primary standards of electrolytic conductivity (IUPAC Technical Report) , 2001 .

[10] Henry C. Parker,et al. THE CALIBRATION OF CELLS FOR CONDUCTANCE MEASUREMENTS. III. ABSOLUTE MEASUREMENTS ON THE SPECIFIC CONDUCTANCE OF CERTAIN POTASSIUM CHLORIDE SOLUTIONS , 1924 .