Table 2 Precision and recovery for the developed HPLC method
Analyte | Precision | Recovery | ||
|---|---|---|---|---|
Intra-day variability RSD (%) | Inter-day variability RSD (%) | Average (%) | RSD (%) | |
Danshensu sodium | 3.33 | 3.77 | 98.77 | 1.64 |
Protocatechuic aldehyde | 3.37 | 3.82 | 97.74 | 1.99 |
Rosmarinic acid | 3.29 | 3.23 | 100.22 | 2.32 |
Lithospermic acid | 2.57 | 2.61 | 101.21 | 1.32 |
Salvianolic B | 3.48 | 0.73 | 103.38 | 3.34 |
Salvianolic A | 3.27 | 3.45 | 99.19 | 2.56 |
Procyanidin B2 | 2.27 | 2.82 | 100.00 | 5.40 |
(−)-Epicatechin | 2.57 | 2.54 | 98.85 | 5.91 |