Producing Laboratory: TERC
Potassium Sulphate

IAEA-RGK-1 was produced from high purity (99.8%) potassium sulphate supplied by the Merck Company. The property value assigned to the IAEA-RGK-1 Certified Reference Material was calculated as activity concentration, expressed in the derived SI unit Bq kg-1.  

Certified values for activity concentration

(based on dry mass)

RadionuclideCertified value [Bq kg-1]Uncertainty (a) [Bq kg-1]Half-life
40141801601.2504 (30) x 109 years

(a) The uncertainty is expressed as a combined standard uncertainty (coverage factor k=1)

Reference date for all specified radionuclide decay corrections: 01 June 2016
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