Table 4. Comparison of ranges or means concentrations of Nickel, Arsenic, Nickel, Tin in milk samples with other Studies .
| Tin | Nickel | Arsenic | Mercury | Reference |
| 29.78 -314.64 | 45.10 – 310.55 | 15.20 – 25.90 | 7.29 -14.95 | This study |
| - | - | 1 – 283 ( µg/lit) |
1.59-7.1 (µg/lit) |
(5) |
| - | - | - | 0.002 ± 0.005 ( µg/g) |
(9) |
| - | - | - | 0.0025 ( µg/g) |
(10) |
| - | - | 0.08-0.00 (mg/kg ) |
- | (6) |
| - | - | 37.90 (µg /kg ) |
- | (11) |
| - | 22.395 ± 0.988 (mg/L) | - | - | (13) |
| - | MDL* (mg/kg) | - | - | (15) |
| - | 0.058-1.750 (µg /g ) |
- | - | (16) |
| 0.59±0.07 (µg/lit) |
12±4 (µg/lit) |
13.7±0.8 (µg/lit) |
- | (19) |
| - | 3.013- 2.097 (mg/L ) | - | - | (14) |
| 0.10 (µg/dl) | 0.04 (µg/dl) | - | - | (18) |
| *Below method detection limit | ||||