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Table 2
OBT activity concentrations (Bq.kg−1 of dry material) determined in each lab for each analysis time plus associated mean (m) and two times the standard deviation (2s) per lab and per day.
| t0 + 2 d | t0 + 15 d | t0 + 30 d | t0 + 90 d | t0 + 180 d | t0 + 360 d | m (lab) | 2s | 2s/m (%) | |
|---|---|---|---|---|---|---|---|---|---|
| Lab 1 | 33.1 | 29.0 | 30.0 | 31.1 | 28.9 | 32.0 | 30.7 | 3.4 | 11.0 |
| Lab 2 # | 50.0 | 27.0 | 24.0 | 28.0 | 36.0 | 33.0 | 21.0 | 63.6 | |
| Lab 3 | Outlier | ||||||||
| Lab 4 | 29.3 | 29.3 | |||||||
| Lab 5 # | 48.0 | < 36 | < 42 | 46.0 | < 34 | < 33 | 47.0 | 2.8 | 6.0 |
| Lab 6 | 30.9 | 30.5 | 30.5 | 30.2 | 30.5 | 29.1 | 30.3 | 1.2 | 4.1 |
| Lab 7 | 28.2 | 27.9 | 35.0 | 28.0 | 26.6 | 29.0 | 29.1 | 6.0 | 20.5 |
| Lab 8 | 28.9 | 29.2 | 28.6 | 28.6 | 30.9 | 29.7 | 29.3 | 1.8 | 6.0 |
| m (day) | 36.5 | 28.7 | 29.6 | 32.0 | 29.2 | 30.9 | |||
| 2s | 19.7 | 2.7 | 7.9 | 14.0 | 3.9 | 5.5 | |||
| 2ss/m (%) | 54 | 9 | 27 | 44 | 13 | 18 |
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