Eurachem Working Groups

Sampling Uncertainty Working Group

Terms of Reference

  1. The Eurachem Sampling Uncertainty Working Group, once established, will operate in accordance with the Constitution agreed in the Eurachem Memorandum of Understanding.
  2. The Eurachem Sampling Uncertainty Working Group will prepare guidance for the evaluation of uncertainties in measurement arising from the process of sampling. This guidance will be applicable to all chemical measurements that require the taking of a sample. It will provide guidance on the assessment of the uncertainty of the measurement that is caused by the process of sampling, and any physical preparation of the sample prior to analysis, and how this can be combined with estimates of uncertainty arising from the analytical process.
  3. These guides will be developed in collaboration with relevant international bodies  and will be updated as experience is gained in their use.



This working group is currently working to revise the Eurachem Guide "Measurement uncertainty arising from sampling". In addition, members of the group  contribute to communication and debate on this subject through conferences and publications.


  • Mike Ramsey - University of Sussex & RSC AMC (Chair) (Eurchem)
  • Steve Ellison - Eurachem & AMC (Secretary) (Eurachem)
  • Achilleas Iakovakis -Aristotle University of Thessaloniki (AUTH), Greece
  • Ilya Kuselman - Independent Consultant on Metrology, Israel (CITAC)
  • Alex Williams - UK (Eurachem)
  • Bertil Magnusson - RISE Research Institutes of Sweden, Sweden (Eurachem, Nordtest)
  • Peter Rostron - RSC AMC, UK (Eurachem UK)
  • Irache Visiers - Applus (EUROLAB)
  • Jorge Eduardo Sarkis - Institute of Nuclear and Energy Research, Brazil (CITAC)
  • Paolo de Zorzi - APAT; Environment Agency, Italy
  • Roger Wood - RSC AMC (UK)
  • Eskil Sahlin - RISE Research Institutes of Sweden (Eurachem Sweden)
  • Pentti Minkkinen* - Lappeenranta University of Technology
  • Silke Richter - BAM, Germany (Eurachem)
  • Vassilis Zonaras - Department of Pesticides Control and Phytomarmacy, Greece



The working group has produced the Eurachem Guide Measurement uncertainty arising from sampling (2007). Following systematic review in 2017, the guide is currently under revision to update in line with recent research and a revised edition is expected to be approved in 2019.


  • Eurachem Workshop on Uncertainty from Sampling in Berlin (April 2008).

Collaborative activities

The working group works closely with other groups interested in sampling, in particular the UK Royal Society of Chemistry Analytical Methods Committee (AMC). Particularly relevant outputs related to the Eurachem Sampling Uncertainty guide are the following sampling-related Technical Briefs produced by the AMC Sampling sub-committee:

  1. Terminology - the key to understanding analytical science. Part 2: Sampling and sample preparation (2005) Technical Brief 19 of the Analytical Methods Committee (ISSN 1757- 5958)
  2. Analytical and sampling strategy, fitness for purpose, and computer games (2005)Technical Brief 20 of the Analytical Methods Committee (ISSN 1757- 5958)
  3. Optimising your uncertainty - a case study (2008)Technical Brief 32 of the Analytical Methods Committee
  4. Measurement Uncertainty arising from sampling: the new Eurachem Guide (2008) Technical Brief 31 of the Analytical Methods Committee
  5. What is uncertainty from sampling, and why is it important? (2008) Technical Brief 16A of the Analytical Methods Committee
  6. The Duplicate Method for the estimation of measurement uncertainty arising from sampling (2009)Technical Brief 40 of the Analytical Methods Committee
  7. The importance, for regulation, of uncertainty from sampling (2009)Technical Brief 42 of the Analytical Methods Committee
  8. Quality Control of routine sampling in chemical analysis (2012) Technical Brief 51of the Analytical Methods Committee

These are all available on the RSC AMC Technical Briefs page.

Past members

Mike Thompson (RSC/AMC/IAG), Kensaku Okamoto (CITAC (Chair)), Bob Johnson (Argonne National Laboratory, USA), Christian Gron (NORDTEST), Manfred Golze (EUROLAB), Rüdiger Kaus (EUROLAB), Ulrich Kurfürst (EUROLAB), Mikael Krysell (EUROLAB), Marc Salit (Observer) (NIST, Washington DC, USA), Máire C. Walsh (State Chemist for Ireland), Jussi Laiho (Geological Survey of Finland / Geoservice Centre), Jenny Lyn (Sussex University)