Active Working Groups

Active Working Groups

Eurachem currently has the following active working groups:

Reference Materials Working group

(Joint with CITAC)

Terms of reference

  1. To establish a working group of experts nominated by GA Members, EA, EUROLAB and other interested organizations with liaisons with Eurachem, to review and update as necessary the guide on ‘Selection and use of Reference Materials’ (2002) following the revision of the ISO/REMCO Guides on RMs.
  2. To contribute to disseminate information on good practice in the selection and use of RMs, by promoting Eurachem guidance on RMs.
  3. To contribute to maintain and update the relevant section on RMs of the Eurachem Reading List.
  4. The Eurachem Reference Materials Working Group has been established and will operate in accordance with the Constitution agreed in the Eurachem Memorandum of Understanding

Current activities

The Eurachem RM working group is currently working to update the guide on ‘Selection and use of Reference Materials’, first published in 2002, following the revision of ISO/REMCO Guides 30-35 on Reference Materials.

RMWG members at the 2018 meeting
Members of the Eurachem Reference Materials Working Group at the inaugural meeting in 2018 at ISS in Rome.


 Eurachem  Maria Belli Italy
  Ute Braun Germany
  Kathrin Breitruck Switzerland
  Stephen Ellison UK
  Nineta Hrastelj Slovenia
  Dimka Ivanova Bulgaria
  Markus Obkircher Switzerland
  Ulf Örnemark Sweden
  Marina Patriarca
  Zbyněk Plzák Czech Republic
  Gonzalez Estibaliz Sastre Spain
  Lorens Sibbesen Denmark
  Angela Sorbo
  Kyriacos Tsimillis Cyprus
  Giovanna Zappa Italy
  Claudia Zoani Italy
CITAC Michela Sega Italy
EA Giulia Suriani Italy
European Commission
Marina Ricci EU


The working group may be contacted via the Eurachem Secretariat using the website contact form.



Method Validation Working Group

The Eurachem Method Validation Working Group (MVWG) aims to function as a centre of expertise in the field by assembling and promoting best practice in Method Validation.

Terms of Reference

  1. The EURACHEM Method Validation Working Group has been established and will operate in accordance with the Constitution agreed in the EURACHEM Memorandum of Understanding, and is as such working:
  2. To provide guidance on method validation. This guidance will be applicable to all chemical analytical laboratories and meet the requirements for accreditation
  3. To organize - and contribute to - international seminars and workshops on issues related to Method Validation within analytical chemistry
  4. To collaborate and provide input on Method Validation into other Eurachem working groups
  5. To follow and discuss new developments within analytical chemistry, which may require new approaches regarding Method Validation
  6. To contribute to the "Reading List" with relevant references on Method Validation in analytical chemistry.



  • MVWG was co-arranger of an international workshop, “Validation / Traceability / Measurement Uncertainty. Challenges for the 21st Century’s analysts”, in Berlin in May 2012 (see under "Completed Events")
  • The MVWG issued a revised edition of the Eurachem Fitness for Purpose guide in 2014 and is currently considering supplementary guidance on individual aspects of method validation.
  • A scientific committee based in the MVWG planned a 2-day Workshop, "Method Validation - Current Practices and Future Challenges" in Ghent, Belgium, May 2016

WS Gent May2016Participants in Ghent, May 2016

  • Contributing with a 3 hours workshop "Are MS-based methods fit for purpose?" at the XXII International Mass Spectrometry Conference in Florence, Italy, August 26 - 31 2018
  • Contributing to the scientific program of the Eurachem Workshop "Validation of targeted and non-targeted methods of analysis" in Tartu, Estonia, May 20 - 21 2019


  • The MVWG is currently considering and working on supplementary guidance on individual aspects of method validation (probably to be included in a coming version of the "Fitness for Purpose" guide as annexes)
  • The MVWG ihave started the work on review/revision of the guide (3rd edition due around 2020-21). 
  • The MVWG is working on illustrative examples (validation protocols) on application of the principles recommended in the "Fitness for Purpose" guide.
  • The MVWG is elaborating a number of shorter leaflets pointing to application of the guide and specific issues described in the guide.

Comment on our guidance

The MVWG will appreciate comments on the present version of the "Fitness for Purpose" guide (Ed. 2, 2014).
This can be done by using the Feedback form on the Eurachem Fitness for Purpose guide (opens on separate site)

Contact the Working Group

The working group may be contacted via the working group Secretary using the Website contact form.
If interested in membership of the working group, the document "Method Validation Working Group – Roles & Responsibilities" should be requested from the secretary. 


  • Isabelle Vercruysse (Belgium)
  • Guy Lamon (Belgium)
  • Lorens Sibbesen (Denmark; Chair)
  • Piotr Robouch (JRC/EU) (C)
  • Pieter Dehouck (JRC/EU)
  • Abdelkader Boubetra (France)
  • Barbara Pohl (Germany) (C)
  • Helen Gika (Greece)
  • Marios Kostakis (Greece)
  • Yvonne Bogan (Ireland) (C)
  • Éidín Christie (Ireland)
  • Helen Cantwell (Ireland; Vice Chair & Secretary)
  • John Clancy (Ireland)
  • Emanuela Gregori (Italy)
  • Marina Patriarca (Italy)
  • Elin Lovise Folven Gjengedal (Norway) (C)
  • Ewa Bulska (Poland) (C)
  • Pedro Pablo Morillas Bravo (Spain)
  • Francisco Raposo (Spain)
  • Elvar Theodorsson (Sweden) (C)
  • Ulf Örnemark (Sweden) (C)
  • Ernst Halder (Switserland)
  • Fatma Akcadag (Turkey)
  • Burcu Binici (Turkey)
  • Aysun Yilmaz (Turkey)
  • Perihan Yolci Ömeroglu (Turkey)
  • Vicki Barwick (UK)
  • Steve Ellison (UK) (C)
    (C): Corresponding member

EEE Proficiency Testing Working Group - “Proficiency Testing in Accreditation”

(A joint EA – Eurolab – Eurachem Working Group)

Terms of Reference

  1. The working group EEE-PT has been established as a joint activity by EA, Eurolab and Eurachem (EEE) to provide support on the use of proficiency testing (PT) to laboratory personnel and accreditation assessors
  2. EA/Eurolab/Eurachem (EEE) may approve other appropriate organisations to become affiliated members to the EEE-PT. EQALM (European Committee for External Quality Assurance Programmes in Laboratory Medicine) is an affiliated member of EEE-PT
  3. The aim is to develop common policy and technical advice covering proficiency testing in all areas of testing, measurement and analysis in order to improve the reliability of testing, measurement and analytical results to meet the European needs
  4. The EEE-PT will follow the general objective and rules of procedure of common working groups set up by EA, Eurolab and Eurachem
  5. The EEE-PT will provide a discussion forum in order to develop support in the form of guidelines and policy papers to:
    • Identify, review and promote the use of cost-effective proficiency testing in laboratory operations and accreditation procedures
    • Help provide information on the availability of PTs
    • Understand and address differences between specific sectors
    • Contribute to the development and revision of International Standards and Guides relating to PTs and other ILCs
    • Develop principles and conditions for using interlaboratory comparisons to support the work of the two permanent ILC working groups of the EA Laboratory Committee in underpinning the mutual recognition arrangements both within EA and between EA and other Recognised Regions such as APLAC and IAAC under the roof of ILAC.
  6. To support ABs in the development of suitable programs to assess and accredit PT providers
  7. To provide a link with other international working groups and bodies in this field, e.g. ILAC PTWG, to promote greater international harmonisation and reduce duplication of effort


Open to representatives from the three parent organisations: EA, Eurolab and Eurachem who are each entitled to nominate five representatives. Affiliated organisations are entitled to nominate three representatives. Additional representatives from the parent or affiliated organisations, along with other international guests, may be associated with the EEE-PT WG at the discretion of the Chair.


  United Kingdom Brian Brookman (Chair)
  United Kingdom Natalie Mason (Secretariat)
EA Czech Republic Dana Dominova
  Denmark Hans D. Jensen
  Germany Christian Lehmann
  Italy Beatrice Bargellini
  Switzerland Ian Mann
  United Kingdom Richard McFarlane
Eurolab Finland Mirja Leivuori
  Germany Ute Braun
  Germany Ulrich Leist
  Germany Johannes van de Kreeke
  Sweden Magnus Holmgren
Eurachem Germany Frank Baumeister
  France Coralie Leonard
  Italy Laura Ciaralli
  Spain Raquel Murtula
  United Kingdom Brian Brookman
EQALM France Stéphanie Albarède
  Hungary Erika Sarkany
  Norway Anne Vegard Stavelin

International guests:

ILAC Secretariat (Australia), ILAC

 Work Programme 2019 - 2020

  1. To update any appropriate policy or guidance documents on the cost-effective and technical use of proficiency testing in co-operation with ILAC and other interested organisations, and to contribute to the discussions within ILAC or any other appropriate international forum on PT activities
  2. To contribute to the revision of international standards and guides which underpin the quality of PTs and to discuss the recognition mechanisms for PT providers, contributing to the harmonisation of accreditation requirements
    1. Revision of Eurachem guide on Selection, Use and Interpretation of Proficiency Testing (PT) Schemes (Second Edition, 2011) on behalf of Eurachem
  3. To support and promote harmonisation of accreditation bodies’ evaluation of laboratories’ participation and performance in PT 
    1. Undertake a survey to understand further how rapid performance evaluation schemes are managed and operated and report back to the EA.
    2. Revise EA-4/18, ‘Guidance on the level and frequency of proficiency testing participation’
  4. To provide a forum for the discussion between the accreditation bodies and the PT stakeholders with regards to the accreditation of PT providers
    1. Give guidance for the harmonisation during the implementation of ISO/IEC 17043
    2. Develop any necessary guidance on the accreditation of PTs for sampling
  5. To view the relation between PT performance and accreditation surveillance mechanisms
  6. To identify mechanisms to promote new PT in all technical areas, including inspection, and to develop a mechanism for the implementation of PTs in areas where they do not currently exist
  7. To provide an overview of the “learning effect” of PT
  8. To co-operate with, and give input, to the EPTIS Project


Previous outputs

Technical Papers:

  • How to interpret information from proficiency test exercises concerning the relative performance of accredited laboratories (2001)


  • Use in Practice of Proficiency Testing by Accreditation Bodies and Laboratories (2003)
  • Accreditation, Recognition or Approval of Proficiency Testing Schemes (2003)

Position Papers:

  • Use of Proficiency Testing as a Tool for Accreditation in Testing (2002) – formed the basis of ILAC22:2004
  • “Trade-Off” issue between Participation in Proficiency Testing and the Level and Frequency of Surveillance Activities (2004)
  • Organisation of Proficiency Tests and Interlaboratory Comparisons for EA Laboratory Committee (2003)
  • Establishment of a Multi Lateral Agreement (MLA) for the Accreditation of Proficiency Testing Providers (2004)
  • Educational Aspects of Proficiency Testing Programs (2005)
  • Use of Measurement Uncertainty in Proficiency Testing (2006)
  • Guidance to accreditation bodies' policies on the level and frequency of proficiency testing participation (2009)
  • Guidance document, for EA, on the content of scopes of accredittaion for PT providers (2015)
  • Developed a guidance document, for EA, with respect to the use of inter-laboratory comparisons with few participants (2018)
  • Developed guidance, for Eurolab, for users of laboratory PT results with respect to a single questionable or unsatisfactory performance score (2018)
  • Position paper on whether rapid performance evaluation schemes can be used as a replacement for traditional PTs and whether they can be accredited to ISO/IEC 17043 developed (2018)


  • Contributed to the revision of ILAC G13 (2007)
  • Eurachem guide on Selection, Use and Interpretation of Proficiency Testing (PT) Schemes (Second Edition, 2011)
  • Contributed to the work of ISO in the revision of ISO 13528 (2015)


You can contact the EEE-PT Secretary here

Sampling Uncertainty Working Group

Terms of Reference

  1. Sampling at micro scale - indentation from micro-beam samplerThe Eurachem Sampling Uncertainty Working Group operates 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.



W plan 250x184The UfS working group is currently working to promote the Eurachem Guide "Measurement uncertainty arising from sampling" (below) and is developing a number of information leaflets related to sampling uncertainty. The WG has also acted as the scientific committee for Eurachem workshops on sampling, and  collaborates with other working groups to promote best practice in sampling.  In addition, members of the group  contribute to communication and debate on this subject through conferences and publications, and via contributions to consultations on regulatory documents.


  • 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 Phytopharmacy, Greece



UfS Guide coverThe working group has published the second edition of the Eurachem Guide Measurement uncertainty arising from sampling (2019).

The second edition of the Guide added several new features, including provisions for handling the large relative uncertainty common in sampling by use of uncertainty factors, and more economical designs for sampling uncertainty studies.



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 51 of the Analytical Methods Committee
  9. Estimating sampling uncertainty – how many duplicate samples are needed? (2014) Technical Brief 58 of the Analytical Methods Committee
  10. Random samples (2014) Technical Brief 60 of the Analytical Methods Committee
  11. Unbalanced robust ANOVA for the estimation of measurement uncertainty at reduced cost (2014) Technical Brief 64 of the Analytical Methods Committee
  12. Sampling theory and sampling uncertainty (2015) Technical Brief 71 of the Analytical Methods Committee
  13. Representative sampling? Views from a regulator and a measurement scientist (2016) Technical Brief 73 of the Analytical Methods Committee
  14. Proficiency testing of sampling (2017) Technical Brief 78 of the Analytical Methods Committee
  15. Beam sampling: taking samples at the micro-scale (2018) Technical Brief 84 of the Analytical Methods Committee
  16. Why do we need the uncertainty factor? (2019) Technical Brief 88 of the Analytical Methods Committee
  17. The role of accreditation in ensuring sampling quality (2019) Technical Brief 90 of the Analytical Methods Committee
  18. What’s novel in the new Eurachem guide on uncertainty from sampling? (2019) Technical Brief 96 of the Analytical Methods Committee

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