Evaluation of measurement uncertainty from in-house precision and recovery data

Contents

Uncertainty models an a laboratory backgroundFollowing the publication of ISO/IEC 17025 in 2017, the community has placed greater emphasis on the reliable evaluation of measurement uncertainty. Nowadays, laboratories are expected to be able to use measurement uncertainty in managing and reporting the risk of false decisions regarding the conformity of tested items.

Given the guidance available on the evaluation of measurement uncertainty produced by Eurachem, Eurolab, and Nordtest, it was considered necessary to develop additional material to help laboratories accurately determine measurement uncertainties.

This Eurachem/CITAC guide is intended to be read in conjunction with the Eurachem guide "Quantifying uncertainty in Analytical Measurement" (QUAM). It discusses the evaluation of measurement uncertainty from in-house validation data, adding detail to the general guidance in QUAM. Key topics include modelling how measurement uncertainty varies with concentrations, and how to handle divergent recovery values from different reference materials. Laboratories now have access to simple algorithms for assessing measurement uncertainty, but for situations where these are insufficient to meet performance requirements, more advanced solutions are provided.

The guide is organised as a tutorial and features numerous practical examples to support its application

 

Availability

This guidance is available in the following languages:

Citation

This publication should be cited* as:
R Bettencourt da Silva (ed.) Eurachem/CITAC Guide: Evaluation of measurement uncertainty from in-house
precision and recovery data. First Edition, Eurachem (2026). ISBN 978-972-9348-30-3. Available from http://www.eurachem.org

*Subject to journal requirements

Translations

Translation into other languages is permitted for members of Eurachem. Other offers of translation should be directed to the Eurachem Secretariat for permission. The Eurachem policy on maintenance and development of Eurachem guidance, available on the Policies page, gives further information on translation.

 

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Last Updated: Monday, 16 March 2026 00:47