Determination of the standard deviation for proficiency assessment from past participant’s performances
The “uncertainty function” introduced by Thompson et al. estimates the reproducibility standard deviation (SR) as a function of concentration. This model was successfully applied to a data set derived from three proficiency testing schemes aiming at the quantification of three toxic elements (cadmium, lead and mercury) in blood and urine. A threshold concentration was determined for each element. Below this concentration SR is found to be constant, while above it the reproducibility relative standard deviation is constant. This model allows the a priori estimation of standard deviation for performance assessment for proficiency testing rounds.
COTE Isabelle;
ROBOUCH Piotr;
ROBOUCH B.V.;
BISSON David;
GAMACHE Philippe;
LEBLANC Alain;
DUMAS Pierre;
PEDNEAULT Michael;
2012-11-06
SPRINGER
JRC72928
0949-1775,
http://link.springer.com/article/10.1007%2Fs00769-012-0906-2,
https://publications.jrc.ec.europa.eu/repository/handle/JRC72928,
10.1007/s00769-012-0906-2,
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