| wt% (6 h) Items | 85 | 38 | 30 | 20 | 10 |
| H3PO4-Rs (Ω) | 1.0 × 1013 | -- | 1.5 × 1013 | 3.0 × 1013 | 4.0 × 1013 |
| HCl-Rs (Ω) | -- | 1.5 × 1013 | 2.5 × 1013 | 3.0 × 1013 | 5.0 × 1014 |