Low-level Radioactivity Ocean Sediment Standard Reference Material

详细信息    查看全文

• 作者：Inn ; Kenneth G. W. ; Zhichao ; Lin ; Liggett ; Walter S. ; Schima ; Francis J. ; Krey ; Phillip ; Feiner ; Melvin ; et. al.
• 刊名：Applied Radiation and Isotopes
• 出版年：1996
• 出版时间：September 10, 1996
• 年：1996
• 卷：47
• 期：9-10
• 页码：967-970
• 全文大小：281 K

文摘

The National Institute of Standards and Technology (NIST), in cooperation with experienced international laboratories, will issue a low-level radioactivity Ocean Sediment Standard Reference Material (SRM) 4357 in 1996. The Ocean Sediment joins the NIST suite of six other ‘natural matrix’ environmental radioactivity Standard Reference Materials. This family of natural matrix materials have already been used: (1) to develop radiochemical procedures; (2) to test radiochemical procedures already in use for environmental and biokinetic evaluations; (3) to calibrate instruments; (4) to intercompare and evaluate radiochemical methods; (5) to test competency of technicians to do radiochemical assays; and (6) to demonstrate that data output is reliable. The participating laboratories provided data for the following 25 radionuclides: ⁴⁰K, ⁹⁰Sr, ⁹⁹Tc, ¹²⁹I, ¹³⁷Cs, ¹⁵⁵Eu, ²¹⁰Pb,²¹⁰ Po, ²¹²Pb, ²¹⁴Bi, ²²⁶Ra, ²²⁸Ra, ²²⁸Ac, ²²⁸Th,²³⁰ Th, ²³²Th, ²³⁴U, ²³⁷U, ²³⁷Np, ²³⁸U, ²³⁸Pu, ²³⁹Pu +²⁴⁰ Pu, ²⁴¹Pu, and ²⁴¹Am. The data for many of these radionuclides are of sufficient quality to establish certified values and reasonable uncertainty limits given the relatively low concentrations of the radionuclides. The uncertainties for a number of certified radionuclides are non-symmetrical and large because of the non-normal distribution of reported values.