Heavy metals | Number of samples | Group A (n=15) | Group B (n=15) | Mean ± SD of group A | Mean ± SD of group B | ||
---|---|---|---|---|---|---|---|
Min | Max | Min | Max | ||||
Copper | 30 | 0.02± 0.04 a | 0.09± 0.01 b | 0.04± 0.03 c | 4.38± 0.02 d | 0.05 ± 0.04 c | 1.43 ± 0.71 e |
Aluminum | 30 | ND | 0.04± 0.01 a | 2.95± 0.04 b | 72.49± 0.03 c | 0.02 ± 0.01d | 27.80 ± 1.48 e |