Parameters | Minimum | Maximum | Mean | [13] standards |
Fe | 57 | 490 | 210.25 | 300* |
Cu | 2.039 | 6.718 | 4.517 | 2000* |
Cr | 0.475 | 5.242 | 2.736 | 50 |
Pb | <0.006 | 3.882 | 1.56 | 10 |
Hg | <0.006 | 1.969 | 1.403 | 6 |