S/N | 226Ra (Bq∙kg−1) | 232Th (Bq∙kg−1) | 40K (Bq∙kg−1) |
1 | 59.3 ± 5.9 | 39.3 ± 6.6 | 331 ± 18 |
2 | 38.9 ± 4.2 | 41.7 ± 7.0 | 293 ± 16 |
3 | 52.4 ± 5.3 | 42.1 ± 7.1 | 299 ± 16 |
4 | 47.3 ± 4.9 | 41.0 ± 6.1 | 329 ± 18 |
5 | 40.6 ± 4.3 | 44.8 ± 7.5 | 321 ± 17 |
6 | 46.5 ± 4.8 | 61.0 ± 10.0 | 340 ± 18 |
7 | 21.5 ± 2.8 | 57.1 ± 9.4 | 316 ± 17 |
8 | 35.7 ± 3.9 | 33.6 ± 5.8 | 300 ± 16 |
9 | 42.5 ± 4.5 | 43.0 ± 7.2 | 313 ± 17 |
10 | 39.2 ± 4.2 | 40.6 ± 6.8 | 294 ± 16 |
11 | 47.6 ± 4.9 | 58.0 ± 9.5 | 320 ± 17 |
12 | 26.7 ± 3.2 | 48.7 ± 8.1 | 332 ± 18 |
13 | 44.4 ± 4.6 | 49.1 ± 8.1 | 318 ± 17 |
14 | 23.8 ± 3.0 | 42.3 ± 7.1 | 350 ± 19 |
15 | 27.5 ± 3.2 | 41.5 ± 7.0 | 309 ± 17 |
16 | 49.4 ± 5.0 | 54.5 ± 5.0 | 310 ± 17 |
17 | 41.6 ± 4.4 | 56.3 ± 9.2 | 356 ± 19 |
18 | 65.7 ± 6.4 | 62.9 ± 10.3 | 321 ± 17 |
19 | 28.5 ± 3.3 | 63.7 ± 10.4 | 330 ± 18 |
20 | 37.5 ± 4.0 | 61.1 ± 10.0 | 328 ± 18 |
Mean ± Std Dev | 40.8 ± 11.6 | 49.1 ± 9.3 | 321 ± 17 |