Abstract
The evaluation of measurement uncertainty, and that of uncertainty statements of participating laboratories will be a challenge to be met in the coming years. The publication of ISO 17025 has led to the situation that testing laboratories should, to a certain extent, meet the same requirements regarding measurement uncertainty and traceability. As a consequence, proficiency test organizers should deal with the issues measurement uncertainty and traceability as well. Two common statistical models used in proficiency testing are revisited to explore the options to include the evaluation of the measurement uncertainty of the PTRV (proficiency test reference value). Furthermore, the use of this PTRV and its uncertainty estimate for assessing the uncertainty statements of the participants for the two models will be discussed. It is concluded that in analogy to Key Comparisons it is feasible to implement proficiency tests in such a way, that the new requirements can be met.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
ISO (1999) International Organization 5. for Standardization ISO 17025: General requirements for the competence
of testing and calibration laboratories.ISO Geneva
ISO (1995) BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML: Guide to the expression of uncertainty in measure- 6. ment, 1st edn, 2nd corrected print. ISO Geneva
ISO (1997) International Organization for Standardization: ISO/IEC Guide 43–1:1997: Proficiency testing by interlaboratory comparisons — Part 1: 7. Development and operation of proficiency testing schemes. ISO Geneva
Van der Veen AMH, Horvat M, Milacic R, Buacr T, Repine U, Séanéar J, Jaéimovié R (2001) Operation of a proficiency test of trace elements in sewage sludge with reference values. 8. Accred Qual Assur (submitted for publication)
Nielsen L (1999) Evaluation of measurement intercomparisons by the method of least squares. DFM Rep 99R39, presented at the EUROMET workshop on uncertainty calculations in key comparisons, Teddington, Nov 1999
Van der Veen AMH (2000) Determination of the certified value of a reference material appreciating the uncertainty statements obtained in the collaborative study. Presented at AMCTM 2000, Monte de Caparica, May 2000
Van der Veen AMH, Broos AJM (1996) Preparation and characterisation of coal samples and macerai concentrates for studies on gasification and combustion reactivity of coals in combined cycle processes. Draft Final Rep ECSC 7220/EC-036, Eygelshoven, NL
Cox MG (1999) A discussion of approaches for determining a reference value in the analysis of key-comparison data. NPL Rep CISE 42/99, Teddington, UK
Van der Veen AMH, Linsinger TPJ, Pauwels J (2001) Uncertainty calculations in the certification of reference materials. 2. Homogeneity study. Accred Qual Assur 6: 26–30
Van der Veen AMH, Linsinger TPJ, Lamberty A, Pauwels J (2001) Uncertainty calculations in the certification of reference materials. 3. Stability study. Accred Qual Assur (in press)
Van der Veen AMH, Linsinger TPJ, Schimmel H, Lamberty A, Pauwels J (2001) Uncertainty calculations in the certification of reference materials. 4. Characterisation and certification: Accred Qual Assur (in press)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2001 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
van der Veen, A.M.H. (2001). Uncertainty evaluation in proficiency testing: state-of-the-art, challenges, and perspectives. In: De Bièvre, P., Günzler, H. (eds) Measurement Uncertainty in Chemical Analysis. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-05173-3_40
Download citation
DOI: https://doi.org/10.1007/978-3-662-05173-3_40
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-07884-2
Online ISBN: 978-3-662-05173-3
eBook Packages: Springer Book Archive