Report - NUCLEUS - IAEA

Contents
Executive summary .................................................................................................................... 5
Acknowledgement...................................................................................................................... 6
1. Introduction .......................................................................................................................... 10
2. Materials and methods.......................................................................................................... 11
2.1 Proficiency test objectives .................................................................................................. 11
2.2 Participants ........................................................................................................................ 11
2.3 Composition and preparation of proficiency test materials............................................... 11
3. Performance criteria ............................................................................................................. 17
3.1 Relative bias ....................................................................................................................... 17
3.2 PT evaluation criteria ........................................................................................................ 17
3.2.1 Trueness........................................................................................................................... 17
3.2.2 Precision.......................................................................................................................... 18
3.3 The z-score value................................................................................................................ 18
3.4 The u-score value ............................................................................................................... 18
4. Results and discussion.......................................................................................................... 20
5. Conclusions .......................................................................................................................... 27
6. References ............................................................................................................................ 28
Appendix A: Summary evaluation sorted by laboratory code and outline of the reported
technical information ..............................................................................................
Appendix B: Performance evaluation tables sorted by radionuclide...........................................
Appendix C: Performance evaluation tables sorted by laboratory code .....................................
Appendix D: List of participating laboratories............................................................................
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