AMCTB 2016 Anal Methods

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Analytical methods committee, AMCTB No. 74 (2016) z-Scores and other scores in chemical proficiency testing—their meanings, and some common misconceptions. Anal Methods 8:5553-5555.

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Analytical methods committee (2016) Anal Methods

Abstract: z-Scores were devised to provide a transparent but widely-applicable scoring system for participants in proficiency tests for analytical laboratories. The essential idea is to provide an appropriate scaling of the difference between a participant’s result and the ‘assigned value’ for the concentration of the analyte. Interpretation of a z-score is straightforward but some aspects need careful attention to avoid misconception. Over time several related scores have been devised to cope with a diversified range of applications. The main types of score have recently been codified in ISO 13528 (2015).

Bioblast editor: Iglesias-Gonzalez J

Cited by

  • Iglesias-Gonzalez et al (2021) Proficiency test in mt-respiration: A necessary tool for reliable and reproducible results. MitoFit Preprints 2021 (in prep).


MitoFit 2021 PT