| Item | standard | ||
| beads | granular | ||
| Adsorption Capacity , % | RH=20% ≥ % | 10.5 | 10.5 |
| RH=50% ≥ % | 25.0 | 25.0 | |
| RH=90% ≥ % | 36.0 | 36.0 | |
| Ratio of size Qualified , %≥ | 95 | 95 | |
| PH | 4-8 | 4-8 | |
| Specific Resistance, Ω.cm ≥ | 3000 | 3000 | |
| Silica , % ≥ | 99 | 99 | |
| Bulk Density, g/l ≥ | 750 | 700 | |
| Qualified Ratio of Spherical Granules ,% ≥ | 90 | -- | |
| Loss on Heating, % ≤ | 1.5 | 1.5 | |