| Time (h) | % difference for test preparation solution stored at room temperature | % difference for test preparation solution stored at 0-4°C | ||
|---|---|---|---|---|
| GPH standard | Skate skin collagen peptide | GPH standard | Skate skin collagen peptide | |
| 0 | - | - | - | - |
| 24 | 0.60 | 0.45 | 0.03 | 0.09 |
| 48 | 0.12 | 0.66 | 0.03 | 0.78 |
| 72 | 0.02 | 0.59 | 0.02 | 0.12 |