Cotton cellulose powder (IAEA-V-9) was prepared at the IAEA Laboratories Seibersdorf. This material was γ-sterilized to ensure long-term stability of the material by inhibiting microbial action.
| Analyte | Value | Unit | 95% C.I. | N | R/I/C |
| Al | 44 | mg/kg | 13 - 53 | 10 | I |
| Ba | 9 | mg/kg | 6 - 12 | 7 | R |
| Br | 0.17 | mg/kg | 0.08 - 0.31 | 7 | I |
| Ca | 240 | mg/kg | 220 - 260 | 15 | R |
| Cd | 0.002 | mg/kg | 0.001 - 0.006 | 3 | I |
| Cl | 600 | mg/kg | 490 - 640 | 9 | R |
| Cr | 0.11 | mg/kg | 0.08 - 0.14 | 7 | R |
| Cu | 0.59 | mg/kg | 0.47 - 0.94 | 14 | R |
| Fe | 11 | mg/kg | 7 - 15 | 15 | I |
| Hg | 0.06 | mg/kg | 0.04 - 0.08 | 5 | R |
| Mg | 53 | mg/kg | 46 - 67 | 11 | R |
| Mn | 0.15 | mg/kg | 0.12 - 0.21 | 15 | R |
| Mo | 0.034 | mg/kg | 0.03 - 0.049 | 3 | R |
| Na | 56 | mg/kg | 49 - 64 | 18 | R |
| Ni | 0.09 | mg/kg | 0.07 -0.18 | 3 | R |
| Pb | 0.25 | mg/kg | 0.22 - 0.33 | 4 | R |
| Sc | 0.009 | mg/kg | 0.007 - 0.01 | 3 | I |
| Se | 0.015 | mg/kg | 0.008 - 0.018 | 3 | I |
| Sm | 0.003 | mg/kg | 0.002 - 0.004 | 3 | I |
| Sr | 0.65 | mg/kg | 0.54 - 0.96 | 7 | R |
| V | 0.09 | mg/kg | 0.07 - 0.1 | 5 | I |
(Value) Mass fraction calculated as the mean of accepted laboratory means
(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 of assigned property value (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).
