Table 1c.
Concentration (mg kg−1) of toxic metals in saltpetre samples.
| Sample ID | As | Cd | Hg | Pd |
|---|---|---|---|---|
| LOD | 1.8 | 1.9 | 1.7 | 1.7 |
| ABU1 | 5.23 ± 1.38 | <LOD | <LOD | 2.62 ± 1.67 |
| ABU2 | 2.49 ± 1.28 | <LOD | <LOD | 3.44 ± 1.66 |
| ABU3 | 3.2 ± 1.17 | <LOD | <LOD | <LOD |
| ASA1 | 3.36 ± 1.29 | <LOD | <LOD | 3.52 ± 1.64 |
| ASA2 | 5.29 ± 1.32 | <LOD | <LOD | 2.46 ± 1.60 |
| ASA3 | <LOD | <LOD | <LOD | <LOD |
| ASY1 | 5.26 ± 1.43 | <LOD | <LOD | 4.13 ± 1.79 |
| ASY2 | 2.94 ± 1.26 | <LOD | <LOD | 3.38 ± 1.62 |
| ASY3 | <LOD | <LOD | <LOD | <LOD |
| AYI1 | 4.09 ± 1.22 | <LOD | <LOD | <LOD |
| AYI2 | 3.37 ± 1.17 | <LOD | <LOD | <LOD |
| AYI3 | 3.61 ± 1.26 | <LOD | <LOD | 2.58 ± 1.59 |
| BAN1 | 2.35 ± 1.2 | <LOD | <LOD | <LOD |
| BAN2 | 3.38 ± 1.29 | <LOD | <LOD | 3.69 ± 1.64 |
| BAN3 | <LOD | <LOD | <LOD | <LOD |
| CEN1 | 8.68 ± 1.41 | <LOD | <LOD | 3.00 ± 1.60 |
| CEN2 | 5.95 ± 1.38 | <LOD | <LOD | 3.88 ± 1.67 |
| CEN3 | 3.27 ± 1.31 | <LOD | <LOD | 5.41 ± 1.69 |
| KNU1 | 4.9 ± 1.29 | <LOD | <LOD | 3.32 ± 1.58 |
| KNU2 | 5.18 ± 1.47 | <LOD | <LOD | 5.15 ± 1.86 |
| KNU3 | 9.36 ± 1.43 | <LOD | <LOD | 2.48 ± 1.59 |
| KWA1 | 5.07 ± 1.29 | <LOD | <LOD | 2.46 ± 1.80 |
| KWA2 | 7.87 ± 1.52 | <LOD | <LOD | 5.11 ± 1.80 |
| KWA3 | 9.37 ± 1.52 | <LOD | <LOD | 3.90 ± 1.75 |
| SAN1 | 2.65 ± 1.22 | <LOD | <LOD | <LOD |
| SAN2 | 3.05 ± 1.17 | <LOD | <LOD | <LOD |
| SAN3 | 6.92 ± 1.36 | <LOD | <LOD | <LOD |
| TAN1 | 3.17 ± 1.27 | <LOD | <LOD | 2.84 ± 1.61 |
| TAN2 | 1.8 ± 1.13 | <LOD | <LOD | <LOD |
| TAN3 | 2.08 ± 1.21 | <LOD | <LOD | <LOD |
| AVERAGE | 4.13 ± 2.47 | <LOD | <LOD | 2.11 ± 1.87 |
ABU = Abuakwa, ASA = Asafo, ASY = Asuoyeboah, AYI = Ayigya, BAN = Bantama, CEN = Central market, KNU =Knust campus, KWA=Kwadaso, SAN = Santasi, TAN = Tanoso.