9th International Workshop on Proficiency Testing (2017)

The 9th International Workshop – Proficiency Testing in Analytical Chemistry, Microbiology and Laboratory Medicine will be held in Portorož, Slovenia during October 2017, organized by the Eurachem Proficiency Testing Working Group in association with EQALM and CITAC. This international PT workshop, building on the success of previous workshops, will enable delegates from around the world to come together to discuss a wide range of key issues across the three disciplines of analytical chemistry, microbiology and laboratory medicine.

Quick links:

Workshop information

Date:9th – 12th October 2017
Venue:St. Bernardin Resort, Portorož, Slovenia
First circular:Download the first circular (pdf, 1M)
Published  summaryBrookman, B., Butler, O., Ciaralli, L. et al. “Proficiency testing in analytical chemistry, microbiology and laboratory medicine: discussions on current practice and future directions”  Accred Qual Assur (2018). https://doi.org/10.1007/s00769-018-1343-7.


Training/Introductory sessions

(Monday 9th October)

Training Session 1
Basic Statistics (Michael Koch, Piotr Robouch)
PT Language and PT reports (Ulf Örnemark)
Training Session 2
Sophisticated PT statistical techniques (Michael Koch, Piotr Robouch)
Graphical PT tools in ISO13528 (Kelly Black)
Training Session 3
Basic Statistics (Michael Koch, Piotr Robouch)
PT Language and PT reports (Ulf Örnemark)
Training Session 4
Sophisticated PT statistical techniques (Michael Koch, Piotr Robouch)
Graphical PT tools in ISO13528 (Kelly Black)

Workshop sessions

Tuesday 10th October

Welcome address [PDF, 1.6 MB]
Brian Brookman & Mitja Kolar
Session 1
Chairs: Brian Brookman, Mitja Kolar
[K-01]The importance of interpretative PT schemes
Vincente Catalán, ielab (Spain)
[K-02]Changes to PTs in developing countries over the last ten years
Michael Koch, University of Stuttgart (Germany)
Session 2
Chair: Owen Butler
[K-03]Implementing ISO/IEC 17043 for sampling PTs
Jean Poulleau, Ineris (France)
[O-01]Proficiency Testing Programmes by Health Sciences Authority Singapore, with assigned values determined by a reference method
Pui Sze Cheow, Chemical Metrology Laboratory (Singapore)
[O-02]Calculation of the standard deviation for proficiency assessment in microbiological proficiency testing schemes
Raquel Múrtula, ielab Calidad (Spain)
Session 3
Chair: Ulla Tiikkainen
 Working group feedback session 1 – see Working group summaries

Top ^^Wednesday 11th October

Session 4
Chair: Kees van Putten
[K-04]Traditional vs. virtual PT items [Prezi]
István Juhos, University of Szeged (Hungary)
[Prezi: opens on Prezi site. Use arrow keys to advance the presentation]
[K-05]Experience of the implementation of EA-4/18
Ian Mann, Swiss Accreditation Service (Switzerland)
Session 5
Chair: Michael Koch
[K-06]Use and treatment of measurement uncertainty in PT schemes [PDF, 560 kB]
Steve Ellison, LGC (United Kingdom)
[O-03]Estimates of measurement uncertainty using data from participation in External Quality Assessment Schemes for trace elements in biological fluids
Marina Patriarca, Istituto superiore di sanità (Italy)
[O-04]Immunosuppressant PT: Investigation of results submitted for the IPT Scheme for the various methodologies used
Karen Morgan, LGC (United Kingdom)
Session 6
Chair: Marina Patriarca
 Working group feedback session 2 – see Working group summaries

Top ^^Thursday 12th October

Session 7
Chair: Monika Horsky
[O-05]Statistical methods to estimate the assigned value in presence of multiple censored results
Marzia Mancin, Istituto Zooprofilattico Sperimentale delle Venezie (Italy)
[O-06]Taking laboratory measurement uncertainties into account in assigned value estimates
Bertrand Colson, QuoData (Germany)
[O-07]What did we learn from the 25 PTs organised by the EURL HM in the past 10 years?
Piotr Robouch, European Commission, Joint Research Centre (Belgium)
[O-08]Novel Proficiency Testing Scheme for 1H, 31P and 19F Quantitative Nuclear Magnetic Resonance (qNMR)
Kathrin Breitruck, Sigma-Aldrich Production (Switzerland)
Session 8
Chairs: Brian Brookman, Mitja Kolar
[O-09]Proficiency Tests for Substances of Emerging Concern in Drinking Water
Ulrich Borchers, IWW Water Centre, Germany [file updated 16/10/2017]
[O-10]How good are laboratories at analyzing silica in workplace air? Results from the AIR proficiency testing programme
Owen Butler, Health and Safety Laboratory, United Kingdom
Closing address [PDF, 1.4 MB]
Brian Brookman
Chair, Eurachem PT Working group

Top ^^

Working group summaries

Working group feedback session 1
Chair: Ulla Tiikkainen

Working group feedback session 2
Chair: Marina Patriarca

Top ^^


CITAC on Twitter

CITAC on Linkedin

to CITAC News

39th CITAC Members’ Web-Meeting

The 39th CITAC Member’s Web Meeting was held on 8 May 2024. There were 13 participants. In the meeting were reported: As well as were presented summaries reports of the activities of the Eurachem/CITAC working groups: And discussed Future CITAC events: As the results of the Meeting: The Woerkshop on


What can we find for you today?