| Inhibitors |
Inhibiting Concentration |
| Sulphate (SO4- - ) |
5,000 ppm |
| Sodium Chloride or Common salt (NaCl) |
40,000 ppm |
| Nitrate (Calculated as N) |
0.05 mg/ml |
| Copper (Cu++ ) |
100 mg/l |
| Chromium (Cr+++ ) |
200 mg/l |
| Nickel (Ni+++ ) |
200 - 500 mg/l |
| Sodium (Na+ ) |
3,500 - 5,500 mg/l |
| Potassium (K+ ) |
2,500 - 4,500 mg/l |
| Calcium (Ca++ ) |
2,500 - 4,500 mg/l |
| Magnesium (Mg++ ) |
1,000 - 1,500 mg/l |
| Manganese (Mn++ ) |
Above 1,500 mg/l |
|
