Determination of inorganic anions in uranium ore concentrate reference materials

The determination of inorganic anions in uranium ore concentrates (UOCs) is useful to nuclear forensics for establishing the provenance of sample materials. In this collaborative study, quantitation of inorganic anions was carried out on three UOC reference materials from the National Research Council Canada: UCLO-1 ( https://doi.org/10.4224/crm.2020.uclo-1 ), UCHI-1 ( https://doi.org/10.4224/crm.2020.uchi-1 ), and UPER-1 ( https://doi.org/10.4224/crm.2020.uper-1 ). The analytes were extracted into water and characterized by ion chromatography with combined standard uncertainties ( u c ) between 1.6 and 11%. The highest contributor to u c was homogeneity. Sulfate was the most abundant anion (2000–12,000 mg/kg SO 4 2− ). Other anions were in the 15–500 mg/kg range.