Evaluation of uncertainty of reference materials |
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| Authors: | J Pauwels A van der Veen A Lamberty H Schimmel |
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| Institution: | (1) Institute for Reference Materials and Measurements, EC-JRC-IRMM, 2440 Geel, Belgium e-mail: jean.pauwels@irmm.jrc.be Tel.: +32-14-571722 Fax: +32-14-590406, BE;(2) Nederlands Meetinstituut, P.O. Box 654, 2600 AR Delft, The Netherlands, NL |
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| Abstract: | Certification of reference materials is far more than just characterisation of a selected homogeneous batch of material.
From the perspective of the ISO Guide on the Expression of Uncertainty in Measurement (GUM) all uncertainty sources relevant
to the user of an individual certified reference material (CRM) sample at a moment in time should be part of the CRM uncertainty.
This not only includes the full uncertainty of the batch characterisation (rather than the statistical variation), but also
all uncertainties related to possible between-bottle variation, instability upon long-term storage and instability during
transport to the customer.
Received: 21 April 1999 · Accepted: 24 September 1999 |
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| Keywords: | Certified reference materials Uncertainty Characterisation Uncertainty analysis |
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