2.2.2. Activity concentration Activity concentrations (AC) in Bq/kg of the naturally occurring radionuclides 226 Ra, 228 Ra, 40 K were calculated by simply dividing the assessed activity of the sample,Ai , with its respective mass, Mi
2.2.2. Activity concentrationActivity concentrations (AC) in Bq/kg of the naturally occurringradionuclides226Ra,228Ra,40K were calculated by simply dividingthe assessed activity of the sample,Ai, with its respective mass, Mi