Table 2 Metal concentration (mean ± SD) in Ethiopian raw and processed tobacco leaves
From: Levels of heavy metals in the raw and processed Ethiopian tobacco leaves
Type of tobacco sample | Concentration of metals (μg/g) | |||||
|---|---|---|---|---|---|---|
Cd | Cu | Cr | Ni | Pb | Zn | |
Billate raw tobacco leaves | 1.20 ± 0.05 | 4.38 ± 0.11 | ND | ND | ND | 53.7 ± 0.96 |
Shewa Robit raw tobacco leaves | 1.30 ± 0.04 | 7.30 ± 0.19 | 1.45 ± 0.11 | 1.96 ± 0.08 | ND | 33.2 ± 1.9 |
Billate processed tobacco leaves | 1.45 ± 0.02 | 9.80 ± 0.04 | 1.65 ± 0.08 | 2.35 ± 0.19 | ND | 101 ± 0.4 |
Shewa Robit processed tobacco leaves | 1.90 ± 0.05 | 12.8 ± 0.11 | 1.75 ± 0.08 | 2.20 ± 0.05 | ND | 83.8 ± 0.4 |
Nyala processed tobacco leaves | 1.55 ± 0.07 | 8.95 ± 0.31 | 1.62 ± 0.11 | 4.70 ± 0.04 | ND | 79.3 ± 0.77 |