Table 2 Activity concentrations and average annual committed effective doses of 238 U, 232 Th and 40 K in the medicinal plant samples
From: Natural radioactivity levels of some medicinal plants commonly used in Ghana
Sample | Activity concentration (Bq kg-1) | Average annual committed Effective dose (mSv a-1) | ||
|---|---|---|---|---|
238U | 232Th | 40K | ||
Lippia multiflora | 32.2 ± 3.1 | 65.6 ± 3.1 | 1093.1 ± 13.1 | 0.014 ± 0.002 |
Croton membranaceus | 36.1 ± 2.8 | 65.5 ± 2.4 | 808.8 ± 12.9 | 0.013 ± 0.002 |
Cassia sieberiana | 25.8 ± 2.2 | 43.0 ± 1.7 | 566.4 ± 7.9 | 0.009 ± 0.001 |
Bridelia ferruginea | 32.6 ± 2.6 | 53.3 ± 1.8 | 993.4 ± 12.6 | 0.012 ± 0.001 |
Mondia whitei | 25.9 ± 3.0 | 46.9 ± 2.2 | 961.1 ± 11.2 | 0.011 ± 0.001 |
Blighia sapida | 20.4 ± 2.0 | 42.0 ± 2.0 | 625.5 ± 10.4 | 0.009 ± 0.001 |
Alstonia boonei | 34.4 ± 4.6 | 62.4 ± 3.4 | 911.1 ± 17.0 | 0.013 ± 0.001 |
Khaya ivorensis | 46.9 ± 2.1 | 70.6 ± 1.9 | 759.1 ± 9.9 | 0.014 ± 0.002 |