Radionuclide

Measurement of activity [Bq/kg]

Radium ²²⁶Ra

491.31 +/− 5.0%

Lead ²¹⁴Pb

413.68 +/− 2.9%

Bismuth ²¹⁴Bi

413.76 +/− 5.0%

Thorium ²³²Th

52.36 +/− 3.6%

Actinium ²²⁸Ac

52.36 +/− 3.6%

Lead ²¹²Pb

53.02 +/− 5.1%

Thallium ²⁰⁸Tl

50.20 +/− 5.4%

Potassium ⁴⁰K

19.04 +/− 10.9%