Eurachem Working Groups

Measurement Uncertainty and Traceability Working Group

This is a joint WG with CITAC.

Terms of Reference

  1. The EURACHEM/CITAC Measurement Uncertainty and Traceability Working Group has been established and will operate in accordance with the Constitution agreed in the EURACHEM Memorandum of Understanding.
  2. The EURACHEM/CITAC Measurement Uncertainty and Traceability Working Group will prepare guidance for the evaluation of uncertainties and establishment of traceability in chemical analysis. This guidance will be applicable to all chemical analytical laboratories and will provide guidance on the assessment of uncertainties and establishment of traceability required for accreditation.
  3. These guides will be developed in collaboration with EA and will be updated as experience is gained in their use.

Work Programme


  • The Working Group produced the Eurachem Guide "Quantifying Uncertainty in Analytical Measurement", first published in 1995 and now in its third edition, which was published in 2012. The 2012 edition can be downloaded in PDF form from this website, and several translations of the second and third editions are available.
  • The Eurachem guide Use of uncertainty information in compliance assessment, published in 2007, provides guidance on how uncertainty may be taken into account in deciding compliance with a limit.
  • In 2003 the Working Group published the present Eurachem guide on "Traceability in Chemical Measurement". This Guide gives principles and guidance for the establishment of measurement traceability in quantitative chemical analysis, and is also available for download here.

Information leaflets

The working group has so far published three information leaflets:

In addition, the WG maintains the leaflet Measurement Uncertainty for Laboratory Customers, originally published by SP and elaborated with Eurolab and others to help customers understand why laboratories report measurement uncertainty.


The Measurement Uncertainty and traceability working group has coordinated several International workshops on measurement uncertainty, including

  • Evaluation of measurement uncertainty (Graz, 1994; Berlin, 1997, Lisbon, 2011)
  • Measurement Uncertainty in Sampling and Compliance (Berlin, 2008)
  • Eurachem Workshop: Quality in Analytical Measurements (Lisbon, 2014)



CountryMember CountryMember
EURACHEM Austria W Wegscheider Serbia-Montenegro Jelena Bebic
  Finland Teemu Naykki Sweden B Magnusson
  Estonia I Leito Sweden E Theodorsson
  Germany W Bremser Switzerland M Rösslein
  Germany M Golze The Netherlands A van der Veen
  Germany R Kaus The Netherlands R Kaarls
  Ireland Éidín Christie Turkey Burcu BİNİCİ
  Ireland John Clancy Turkey P Yolci
  Ireland Breda Moore United Kingdom A Williams (Chair)
  Ireland M Walsh United Kingdom S Ellison (Secretary)
  IRMM (EC) P Robouch United Kingdom R MacArthur
  Portugal R Bettencourt da Silva  Ukraine O Levbarg
  Portugal O Pellegrino    
  Poland A Brzyski    
CITAC China P X Rong Israel I Kuselman
  USA M Salit Japan K Yasuda


The working group may be contacted via the working group Secretary using the Website contact form.