Activity measurements of the radionuclide 99mTc for the NIST, USA in the ongoing comparison BIPM.RI(II)-K4.Tc-99m

Abstract

In 2009, the first comparison of activity measurements of 99mTc using the Transfer Instrument of the International Reference System (SIRTI) took place at the National Institute of Standards and Technology (NIST), USA. An ampoule containing about 30 kBq of 99mTc traceable to the NIST primary standard was measured in the SIRTI for more than three half-lives. The influence of the 99Mo impurity was negligible. The comparison, identifier BIPM.RI(II)-K4.Tc-99m, is linked to the BIPM.RI(II)-K1.Tc-99m comparison, and the degrees of equivalence with the key comparison reference value and between the present NIST result and the six participants in the K1 comparison have been evaluated. Consistency between the USA and European activity measurements of 99mTc is demonstrated.Main text.To reach the main text of this paper, click on Final Report.Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.The final report has been peer-reviewed and approved for publication by the CCRI Section II, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA).