Workshop 2002

Workshop on Measurement Traceability and Uncertainty in Analytical Chemistry Meeting the requirements of ISO/IEC 17025. Traceability and uncertainty are important elements of measurement results and for this reason they are given greater emphasis in ISO/IEC 17025 than in Guide 25. The main objective of this workshop was to share experiences and to develop guidance on how these requirements can be met in a cost effective manner.

Training Lectures

This training course is designed to give an introduction to the evaluation of uncertainty for those who are not familiar with the current EURACEM/CITAC Guide "Quantifying Uncertainty in Analytical Measurement" 2nd edition.

  1. Matthias Roesslein - Why do we have measurement uncertainty? more... (1.5 MB)
  2. Steve Ellison - Implementing measurement uncertainty in analytical chemistry more... (0.2 MB)
  3. Adriaan M.H. van der Veen - Use of error modelling in evaluating measurement uncertainty more... (0.2 MB)

Talks concerning Measurement Uncertainty

After reviewing these requirements, the first session concentrated on the experience gained using the 2nd edition of the EURACHEM/CITAC Guide "Quantifying Uncertainty in Analytical Measurement" with particular emphasis on the use of validation data in uncertainty estimation. Working Groups considered such topics as practical examples of uncertainty evaluation, design of validation studies to provide uncertainty data and experience on implementation of ISO/IEC 17025. In addition topics not covered in the current edition of the EURACHEM/CITAC Guide, such as evaluation of uncertainty near detection limits and in qualitative analysis have been discussed, together with current work being carried out to update GUM.

  1. Alan Squirrell - ISO/IEC 17025 requirements on measurement uncertainty and traceability more... (0.1 MB)
  2. Matthias Roesslein - Introduction to Eurachem/CITAC uncertainty guide 2nd edition more... (1.4 MB)
  3. Steve Ellison - Procedures for utilising validation data for uncertainty evaluation more... (0.3 MB)
  4. Bernard King - Interpretation of ISO/IEC 17025 guidance on measurement uncertainty and traceability more... (0.1 MB)
  5. Adriaan M.H. van der Veen; Annarita Baldan; Maurice G. Cox - Application of the GUM to purity verification: an outlook to new approaches for evaluation of measurement uncertainty more... (0.2 MB)
  6. Lionel Spack (NRC Nestlé) - Introduction of the measurement uncertainty concept in Nestlé laboratories more... (0.7 MB)

Traceability

The second session covered the EURACHEM/CITAC Guide "Traceability in Chemical Measurement", giving practical guidance on how to establish the traceability of results obtained using existing methods. Selection and use of reference materials for establishing traceability has been discussed as has been the international work being carried out under the auspices of BIPM to provide traceability to SI. Working Groups on traceability for existing methods, traceability and method development, selection and use of reference materials, accreditation and the development of international traceability system were hold.

  1. Wolfhard Wegscheider - Principles and purpose of traceability more... (0.4 MB)
  2. Alex Williams - Introduction to EURACHEM/CITAC draft guide on traceability more... (0.4 MB)
  3. Marc Salit - Selection and use of reference materials for establishing traceability more... (0.9 MB)
  4. Robert Kaarls - Establishing international traceability and comparability more... (0.7 MB)