General Paper

Accreditation and Quality Assurance

, 16:483

First online:

Dark uncertainty

  • Michael ThompsonAffiliated withSchool of Science, Birkbeck University of London Email author 
  • , Stephen L. R. EllisonAffiliated withLGC Ltd

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Standard uncertainties obtained by the GUM approach for a range of analytical methods are compared directly and indirectly with estimates of reproducibility standard deviation for the same methods. Results were obtained from both routine analysis and international key comparisons. A general tendency for the uncertainty to be substantially less than the reproducibility standard deviation was found.


Uncertainty Dark uncertainty Reproducibility conditions GUM