| ITEMS |
SPECIFICATION |
METHOD |
| Appearance |
Clear solution colorless, odorless |
By Visual |
| Identification |
Conform to Standard |
- |
| Purity |
85 % min |
Alkanide – acid titration |
| Chlorides (CI) |
0005% max |
Turbidity with AgNO3 |
| Sulphate (SO4-2) |
0.002% max |
Turbidity with BaCl2 |
| Content of Iron (Fe) |
0.0005% max |
Complex spectrophotometric method |
| Heavy Metal (as Pb) |
0.0001% max |
Color comparison with hydrogen sulfide |
| Arsenic |
0.0001% max |
Color comparison with AgDTCC in pyridine |
| Fluoride (F) |
0.001% max |
Fluoride with the ion-selective Electrode |
| Nitrates |
0.0005% max |
Color comparison with indigo carmine |
| Volatile acids (as Acetic acid) |
0.001% max |
Distillate and titrate with NaOH 0,1N |
| Content of P2O5 |
61% min |
ISO 3706:1976 (Quinoline phosphomolybdate gravimetric method) |
| Content of H3PO3 |
0.012% max |
Determine phosphate and then Oxydize phosphite to phosphate by KMnO4 / H2SO4 and determine total phosphate again |
