All PT roads led to Rome: Proficiency Testing Workshop Brian BrookmanAntonio MendittoMarina Patriarca Editorial 09 April 2009 Pages: 409 - 410
Performance of MM-estimators on multi-modal data shows potential for improvements in consensus value estimation Stephen L. R. Ellison General Paper 04 August 2009 Pages: 411 - 419
PT/EQA standards and guidelines: some remarks on quality and reliability of test items Maria Belli General Paper 07 July 2009 Pages: 421 - 426
Criteria to define the standard deviation for proficiency assessment for the determination of essential trace elements in serum: comparison of Z-scores based on the Horwitz function or on biological variability Josiane ArnaudRobert L. JonesCas Weykamp General Paper 30 July 2009 Pages: 427 - 430
Official proficiency tests of the organisation for the prohibition of chemical weapons: current status and future directions Vinita DubeySanila VelikelothGary Mallard General Paper 12 April 2009 Pages: 431 - 437
External Quality Assessment in laboratory medicine: is there a rationale to determine frequency of surveys? Annette Thomas General Paper 30 July 2009 Pages: 439 - 444
Analytical performance is improved by regular participation in proficiency testing: an analysis of data from the Aquacheck proficiency testing scheme Matthew WhettonHelen Finch Practitioner's Report 21 February 2009 Pages: 445 - 448
Regular participation in proficiency testing provides long term improvements in laboratory performance: an assessment of data over time Wayne GauntMatthew Whetton Practitioner's Report 01 May 2009 Pages: 449 - 454
Proficiency testing of animal nutrition laboratories Gilberto Batista de SouzaAna Rita A. NogueiraWaldomiro Barioni Jr Practitioner's Report 22 July 2009 Pages: 455 - 460
Instability of mercury in specimens of human urine for external quality assessment Andrew TaylorRobert L. JonesCas Weykamp Practitioner's Report 18 March 2009 Pages: 461 - 466
Comparison of different approaches to the statistical evaluation of proficiency tests Jaroslava SrnkováJiří Zbíral Practitioner's Report 16 May 2009 Pages: 467 - 471
Proficiency testing for measurement of radon (222Rn) in drinking water Irma MäkinenUlla-Maija Hanste Practitioner's Report 06 February 2009 Pages: 473 - 476
Proficiency test on incurred and spiked pesticide residues in cereals Mette Erecius PoulsenHanne B. ChristensenSusan S. Herrmann Practitioner's Report 04 July 2009 Pages: 477 - 485
Measurement of PAHs in environmental matrices: results from an interlaboratory comparison on the different steps of the measurement procedure Stefania BalzamoPaolo de ZorziSilvia Rosamilia Practitioner's Report 31 July 2009 Pages: 487 - 495
Inter-laboratory comparison scheme for fuel sector, LABKAR in Turkey Özlem Türker BayrakEnder OkandanHale Üçkardeş Practitioner's Report 28 May 2009 Pages: 497 - 502
Proficiency testing in food microbiology “Aqua”: enumeration of Staphylococcus aureus M. GrimaldiM. MancinR. Mioni Practitioner's Report 25 July 2009 Pages: 503 - 505
Proficiency testing in analytical chemistry, microbiology and laboratory medicine: working discussions on current practice and future directions Maria BelliBrian BrookmanBarry Tylee Discussion Forum 21 February 2009 Pages: 507 - 512
Interlaboratory comparisons: towards global chemical safety News and Announcements 24 July 2009 Pages: 513 - 513