Table 3 Precision and accuracy study of the method
Peak | Compounds | Precision (RSD %, n= 6) | Accuracy (RSD %, n= 3) | |||
|---|---|---|---|---|---|---|
Instrument | Repeatability | Low | Medium | High | ||
1 | Dracorhodin | 1.3 | 1.4 | 102.8 (2.2) | 96.2 (2.5) | 98.2 (2.3) |
2 | 4,6-Dihydroxy-2-methoxy-3- methyldihydrochalcone | 0.8 | 2.1 | 94.2 (3.2) | 94.7 (1.8) | 95.3 (3.4) |
3 | 4,6-Dihydroxy-2-methoxy-3- methylchalcone | 1.6 | 3.1 | 99.3 (2.0) | 97.7 (3.5) | 100.6 (2.5) |
4 | (2S)-5,7-Dihydroxy- dihydroflavone | 0.9 | 2.7 | 102.7 (2.8) | 96.1 (1.9) | 96.4 (4.9) |
5 | (2S)-5-Methoxyflavan-7-ol | 2.5 | 3.8 | 99.9 (3.8) | 101.0 (2.0) | 99.8 (3.7) |
6 | (2S)-5-Methoxy-6- methylflavan-7-ol | 1.5 | 2.7 | 101.5 (4.5) | 99.8 (2.9) | 98.7 (4.5) |