Radioactivity Standards Reference Materials

These sales represent an important part of a continuing program to supply standards for the nation and international markets.  The NRMAP-NIST collaborative radiopharmaceutical standards program accounted for the production, standardization, and distribution of 34 newly-issued SRMs, consisting primarily of short-lived nuclides: ¹³¹I (SRM 4401H and 4401L, lots 35 and 36), ⁹⁹Mo (SRM 4412H and 4412L, lots 34 and 35), ⁶⁷Ga (SRM 4416H and 4416L, lots 30 and 31), ^99mTc (SRM 4410H, lots 35 and 36), ²⁰¹Tl (SRM 4404H and 4404L, lots 32 and 33), ¹¹¹In (SRM 4417H and 4417L, lots 29 and 30), ¹³³Xe (SRM 4415H and 4415L, lots 33 and 34), ⁹⁰Y (SRM 4427H and 4427L, lots 13 and 14), ¹²⁵I (SRM 4407H and 4407L, lots 34 and 35).  In addition, this year, new issues of ²³⁹Pu (SRM 4330C), ²⁴³Am (SRM 4332E), and ⁶³Ni (SRM 4226D) standards were also completed and placed into SRM inventory, along with re-certification and re-inventorying of ²³⁸Pu (SRM 4323B), ²¹⁰Pb (SRM 4337), ²⁴³Cm (SRM 4329), ²²²Rn (SRM 4973), ³H (SRM 4927F), ²³²U (SRM 4324B), ⁹⁰Sr (SRM 4919I) and Oxalic Acid (4990C) standards.  The new ²⁴²Pu (SRM 4334I) was also made available for sale and distribution.  Ongoing work includes the completion of the Ocean Shellfish Radioactivity Standard (SRM 4358) certification, and the standardizations of ²²⁸Ra, ²⁴⁴Cm and ²³⁷Np.