Table 3.
Precision and recovery of the 12 investigated compounds.
| No. | Compound | Precision (RSD, %) | Recovery (%, n = 3) | ||
|---|---|---|---|---|---|
| Intraday (n = 6) | Interday (n = 6) | Mean | RSD (%) | ||
| 1 | Fumaric acid | 2.59 | 4.86 | 97.60 | 1.96 |
| 2 | Caffeic acid | 4.35 | 3.73 | 95.64 | 2.29 |
| 3 | Catalpol | 2.55 | 2.38 | 97.18 | 2.66 |
| 4 | Aucubin | 3.81 | 4.76 | 95.16 | 2.38 |
| 5 | p-Coumaric acid | 4.08 | 2.70 | 95.66 | 3.43 |
| 6 | Ferulic acid | 3.81 | 6.87 | 95.39 | 2.97 |
| 7 | Harpagide | 1.68 | 1.65 | 94.98 | 2.26 |
| 8 | Cinnamic acid | 2.50 | 2.37 | 95.73 | 2.76 |
| 9 | p-Methoxycinnamic acid | 2.81 | 1.69 | 95.85 | 2.08 |
| 10 | Verbascoside | 3.40 | 3.40 | 95.98 | 3.52 |
| 11 | Angoroside C | 2.13 | 2.00 | 96.20 | 3.60 |
| 12 | Harpagoside | 0.96 | 2.65 | 93.50 | 2.09 |