Table 2.
List of ageing tests in PBS and H3PO4
| Samples | Solutions | Ageing time (h) |
|---|---|---|
| LD30N | PBS | 3, 5, 12 |
| H3PO4 | 3, 5, 12 | |
| LD30U | PBS | 3, 5, 12 |
| H3PO4 | 3, 5, 12 | |
| EX30N | PBS | 3, 5, 12 |
| H3PO | 3, 5, 12 | |
| EX30U | PBS | 3, 5, 12 |
| H3PO4 | 3, 5, 12 |
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