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Stability of PEth preparation stock and spiking Solutions prepared in methanol.
| Sample/Stability Condition |
CV (%) | Difference from Control (%) |
n | |
|---|---|---|---|---|
| Preparation Stock Solution | ||||
| Room Temperature1 | 3.9 | 1.1 | 3 | |
| Long-Term2 | 1.8 | −4.5 | 3 | |
| Spiking Solutions | ||||
| Room | QL | 0.7 | 2.7 | 3 |
| Temperature1 | QH | 5.3 | 0.6 | 3 |
| Long-Term3 | QL | 1.8 | 1.7 | 3 |
| QH | 0.5 | −2.6 | 3 | |
Kept at room temperature for 24 hours.
Stored at −20 C for 547 days.
Stored at −20 C for 462 days.
