Table 7 Mean concentration (mean ± SD, n = 9, μg/g dry weight) and standard deviation of selected metals in each sample analyzed by FAAS
From: Levels of selected metals in leaves of Cannabis sativa L. cultivated in Ethiopia
Element | Sample sites | |||
|---|---|---|---|---|
Butajira (SNNP Region) | Metema (Amhara Region) | Sheshemene (Oromia Region) | Mekelle (Tigray Region) | |
Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | |
Ca | 868 ± 71 | 1,511 ± 53 | 657 ± 76 | 1,210 ± 130 |
Zn | 377 ± 20 | 315 ± 9.8 | 380 ± 43 | 321 ± 15 |
Ni | 149 ± 19 | 124 ± 13 | 162 ± 14 | 172 ± 18 |
Cu | 122 ± 14 | 141 ± 16 | 176 ± 23 | 165 ± 16 |
Cd | 3.2 ± 0.2 | 3.7 ± 0.4 | 4.7 ± 0.3 | 3.4 ± 0.2 |
Pb | 8.3 ± 0.9 | 10.2 ± 1.6 | 7.9 ± 0.3 | 9.6 ± 0.7 |
Cr | 3.9 ± 0.6 | 7.6 ± 1.3 | 3.6 ± 0.2 | 3.8 ± 0.3 |