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Table 1

Certified and measured values (Bq kg−1 based on dry mass) of radionuclide certified reference materials (CRMs).

Radionuclide CRM Certified value Confidence interval
(α = 0.05)
Measured value
(n = 3)
137Cs IAEA-414 5.18 5.12–5.22 5.18 ± 0.38
239+240Pu IAEA-414 0.12 0.116–0.123 0.116 ± 0.013

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