Worldwide Open Proficiency Test: Determination of ... - Nucleus - IAEA

APPENDIX I: PERFORMANCE EVALUATION TABLES SORTED BY ANALYTE
All results listed in this Appendix are expressed in Bq/kg units at a reference date set to 15
November 2009.
The abbreviations used in the Table header are explained below:
Rep. Value: Reported measurement result value for the analyte of interest in Bq kg -1 .
Rep. Unc. Reported standard measurement result uncertainty in Bq kg -1 .
Unc. [%] Reported standard measurement result uncertainty in percentage.
Rel. Bias Relative bias calculated according to formula (1) in paragraph 3.1.
A1 and A2 Evaluation estimators for trueness please see 3.4 in the report body.
True Evaluation score for Trueness please see 3.4 in the report body.
P Evaluation estimator for precision please sees 3.4 in the report body.
Prec. Evaluation score for Precision, please see 3.4 in the report body.
A Acceptable: The reported measurement result fulfils the PT criteria.
W Acceptable with Warning: Although the relative bias of the reported
measurement result meets the PT criteria, but a flag was raised due to either
underestimated or overestimated measurement result uncertainty.
N Not Acceptable: The reported measurement result did not fulfil the PT
criteria.
The evaluation results are presented in ascending order of the laboratory code.
Final Darft, page 41