The milk and whey powders (IAEA-152 and IAEA-154) were donated to the IAEA by a milk processing facility in the former USSR whereas IAEA-321 (milk powder) was collected from an European dairy products processing plant. The materials were produced from cow’s milk obtained from animals that had grazed on land contaminated with radioactive fallout resulting from the Chernobyl incident in 1986. These materials were γ-sterilized to ensure long-term stability of the material by inhibiting microbial action.
Reference date for decay correction: 1987-08-31
| Anlyte | Value | Unit | 95% C.I. | N | R/I/C |
| 134Cs | 764 | Bq/kg | 722 – 802 | 35 | R |
| 137Cs | 2129 | Bq/kg | 2053 – 2209 | 34 | R |
| 40K | 539 | Bq/kg | 510 – 574 | 28 | R |
| 90Sr | 7.7 | Bq/kg | 7.0 – 8.3 | 16 | R |
(N) Number of accepted laboratory means which are used to calculate the recommended or
information values and their respective confidence intervals
(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)The values listed above were established on the basis of statistically valid results submitted by laboratories which had participated in one or more international interlaboratory comparisons organized by the Chemistry Unit, IAEA Laboratories, Seibersdorf. The details concerning the criteria for qualification as a recommended or information value can be found in the respective report (attached).
