Table 2.
Intra-day and inter-day variabilities of quercetin-3-O-glucuronide and ellagic acid.
| Standard | Conc. (μg/mL) | Intra-Day Variability (n = 3) | Inter-Day Variability (n = 3) | ||
|---|---|---|---|---|---|
| Mean ± SD | RSD (%) | Mean ± SD | RSD (%) | ||
| Quercetin-3-O-glucuronide | 93.6 | 97.3 ± 0.5 | 0.6 | 97.7 ± 0.7 | 0.7 |
| 187.2 | 194.2 ± 0.2 | 0.1 | 193.8 ± 0.5 | 0.3 | |
| 374.4 | 386.3 ± 0.6 | 0.2 | 387.2 ± 2.0 | 0.5 | |
| Ellagic acid | 96.0 | 104.5 ± 0.5 | 0.5 | 104.2 ± 2.1 | 2.0 |
| 192.0 | 210.3 ± 0.6 | 0.3 | 209.3 ± 2.9 | 1.4 | |
| 384.0 | 416.1 ± 1.5 | 0.4 | 415.2 ± 5.5 | 1.3 | |
Conc., concentration; RSD, relative standard deviation.