Welcome
Eurachem and CITAC welcome analysts interested in the evaluation of chemical analysis uncertainty and in how to use this information in results interpretation. The Eurachem Week 2026 will begin with a training course on “Evaluation of the measurement uncertainty from in-house precision and recovery data” scheduled for Sunday, 10 May 2026. A two-days workshop on “Quality in Analytical Measurements: Uncertainty Evaluation and Results Interpretation” open to all interested participants will take place from 11 to 12 May 2026. On 13 May 2026, the Eurachem Working Groups will convene, followed by the Eurachem General Assembly, which will bring together the Executive and national delegates on 14 and 15 May. Both Working Group Meetings and the General Assembly are restricted to their members.
Evaluation of measurement uncertainty from in-house precision and recovery data
Following 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
More information:https://www.eurachem.org/index.php/publications/guides/gd-mupr
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