Table 3.
Extraction recovery and matrix effect of 5-ISMN in plasma (n = 6).
| Compound | Nominal con. (ng/mL) | Recovery (%) n = 6 | Mean recovery% (RSD %) | Matrix effect (%) n = 6 | IS-normalized matrix effect | Mean matrix effect% (RSD %) | |
|---|---|---|---|---|---|---|---|
| 5-ISMN | IS | ||||||
| 5-ISMN | 8 | 82.6 | 87.0 (7.0) | 95.5 | 88.6 | 107.8 | 102.1 (0.85) |
| 80 | 84.3 | 87.0 | 88.3 | 98.6 | |||
| 13C6-5-ISMN | 800 | 93.8 | 93.4 | 94.3 | 99.8 | ||
| 1000 | 80.9 | NA | NA | NA | NA | 102.1 (0.67) | |
Concentration is in 3 significant figures; RSD%, percent relative standard deviation (in one decimal place). NA, not available.