Table 2. Heavy metals (mg/kg) composition in powdered pepper from selected markets in Kwara state, Nigeria
| Samples | Lead | Arsenic | Copper | Cadmium |
| Control | 3.45±0.011)c2) | 21.75±0.18b | 3.05±0.10f | ND4) |
| Offa market | 1.84±0.02e | 22.68±0.11a | 3.64±0.03e | ND |
| Oja-oba market | 3.37±0.22c | 14.53±0.13e | 4.07±0.09d | ND |
| Ganmo market | 6.25±0.04a | 10.18±0.14g | 2.64±0.03g | ND |
| Shao market | 1.85±0.01e | 20.22±0.14c | 6.42±0.02a | ND |
| Elemere market | 2.88±0.06d | 18.46±0.01d | 6.14±0.06b | ND |
| Malete market | 4.64±0.04b | 12.01±0.15f | 5.27±0.09c | ND |
| Mean | 3.47 | 17.12 | 4.46 | |
| p-level | ***3) | *** | *** | |
All values are mean±SD (n=3).
Means with the same superscripts (a-g) within the same column are not significantly different (p>0.05).
***p<0.001.
ND, not detected.