Corrections to the Faraday as Determined by Means of the Silver Coulometer

  • Richard S. Davis
  • Vincent E. Bowert


An enduring metrological discrepancy has been the failure of the Faraday constant as measured electrochemically to agree with the calculation of that constant from other precisely known physical constants [1]. At the last meeting of this conference, we presented results of a measurement of the Faraday constant by means of a silver coulometer [2,3]. At that time, we were able to report a high experimental precision for measurements of this type but had not yet given serious consideration to effects of impurities. Impurities have now been accounted for but their effect does not alter the inconsistency described above. A brief description of the silver coulometer experiment, an analysis of effects of the impurities in the silver sample, and a discussion of possible remaining systematic errors follows.


Metallic Silver Faraday Constant Fundamental Constant Isotope Dilution Mass Spectrometry Pure Silver 
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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • Richard S. Davis
    • 1
  • Vincent E. Bowert
    • 1
  1. 1.Center for Absolute Physical QuantitiesNational Bureau of StandardsUSA

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