| ≥1 piece |
| Item | Description Standard | Q/YPS006-2008 |
| 1 | (C6H14N2O2). SO4(dry basis) | ≥51% |
| 2 | Other Amino Acid | ≥10% |
| 3 | Lossing on Drying | ≤3.0% |
| 4 | Burn Residue | ≤4.0% |
| 5 | Ammonium Salts(as NH+4) | ≤1.0% |
| 6 | Heavy Metals (as Pb) | ≤30mg/kg |
| 7 | Arsenic (As) | ≤2.0mg/kg |
| 8 | Granularity>1.5mm | ≤10.0/mm |
| 9 | PH | 3.5~6.5 |