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How to interpret information from proficiency test exercises concerning the relative performance of accredited laboratories |
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| Authors: | L. Cortez A. Duarte A. Hundewadt A. Schmidt B. Steffen D. Tholen H. Fostel I. Papadakis M. G. del Monte N. Boley P. M. van Berkel |
| Affiliation: | (1) EEE-PT Chairman, IPQ, Rua Antonio Giao 2, 2829–513 Caparica, Portugal;(2) EEE-PT Secretariat, RELACRE, Rua Filipe Folque 20–6ºD, 1050–113 Lisboa, Portugal;(3) DANAK, Tagensvey 137, 2200 Kopenhagen, Denmark;(4) EUROLAB/BAM, Unter den Eichen 87, 12205 Berlin, Germany;(5) DAR/BAM, Unter den Eichen 87, 12205 Berlin, Germany;(6) Statistical Consulting Services, 823 Webster Street, Traverse City, Michigan 49686 , USA;(7) BMwA—Abt. IX/2, Landstraßer Hauptstr. 55–57, 1030 Wien, Austria;(8) Department of Chemistry, University of Cyprus, P.O.Box 20537, 1678 Nicosia, Cyprus;(9) EURACHEM Italy, Viale Aeronautica 99, 00144 Roma, Italy;(10) LGC, Queens Road, Teddington, Middlesex, TW11 0LY, United Kingdom;(11) Kiwa Water Research, P.O. Box 1072, 3430 BB Nieuwegein, The Netherlands |
| Abstract: | If the results from various proficiency tests are used to compare the performance of accredited and non-accredited laboratories, great care must be taken not to come to contradicting conclusions when interpreting them. This paper intends to draw the attention to various aspects that should be taken into account when trying to make conclusions from the relative performance of accredited laboratories in proficiency testing. |
| Keywords: | Proficiency test exercises Accredited laboratories Relative performance |
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