Table 2b.
The concentration levels of heavy metals (mg/L) in fresh milk bought from stores in Pretoria.
| Samples | As | Cr | Cu | Fe | Mg | Mn | Ni | Pb | Se | Zn |
|---|---|---|---|---|---|---|---|---|---|---|
| A | 0.025±0.017 | 0.007±0.010 | 0.013±0.006 | 0.242±0.067 | 3.922±0.308 | 0.009±0.001 | 0.006±0.007 | 0.020±0.005 | 0.047±0.052 | 0.218±0.053 |
| B | 0.021±0.033 | 0.019±0.011 | 0.015±0.009 | 0.284±0.093 | 3.539±0.248 | 0.007±0.001 | 0.009±0.007 | 0.014±0.007 | 0.060±0.006 | 0.229±0.026 |
| C | 0.029±0.041 | 0.021±0.014 | 0.018±0.010 | 0.430±0.142 | 3.373±0.161 | 0.016±0.001 | 0.009±0.007 | 0.013±0.008 | 0.048±0.006 | 0.262±0.040 |
| D | 0.027±0.037 | 0.022±0.015 | 0.023±0.012 | 0.297±0.015 | 3.938±0.237 | 0.015±0.001 | 0.008±0.006 | 0.036±0.018 | 0.049±0.005 | 0.297±0.076 |
| E | 0.027±0.038 | 0.026±0.016 | 0.018±0.015 | 0.274±0.049 | 4.066±0.253 | 0.010±0.003 | 0.017±0.016 | 0.014±0.009 | 0.041±0.008 | 0.364±0.167 |
| F | 0.025±0.036 | 0.025±0.016 | 0.011±0.006 | 0.288±0.022 | 3.535±0.217 | 0.010±0.001 | 0.008±0.006 | 0.013±0.007 | 0.040±0.008 | 0.199±0.006 |
| G | 0.029±0.039 | 0.022±0.016 | 0.025±0.006 | 0.434±0.013 | 4.704±0.432 | 0.019±0.001 | 0.006±0.005 | 0.021±0.003 | 0.049±0.005 | 0.247±0.038 |
| H | 0.028±0.038 | 0.026±0.017 | 0.019±0.012 | 0.427±0.143 | 4.145±0.448 | 0.018±0.009 | 0.006±0.005 | 0.013±0.009 | 0.047±0.006 | 0.215±0.020 |
| Range |
0.021±0.033 -0.029±0.041 |
0.007±0.010 -0.026±0.016 |
0.011±0.006 -0.025±0.006 |
0.242±0.067 -0.434±0.013 |
3.373±0.161 -4.704±0.432 |
0.007±0.001 -0.019±0.001 |
0.006±0.005 -0.017±0.016 |
0.013±0.007 -0.036±0.018 |
0.040±0.008 -0.060±0.006 |
0.199±0.006 -0.364±0.167 |
| WHO Recommended limits |
0.01 | 0.05 | 1.50 | 0.5 | 150 | 0.40 | 0.02 | 0.01 | 0.02 | 5.00 |