| Materials | Linearity (r2) | Recovery (%) | LOQ (mg·L−1) | RSD (%) | |
| Inter-day | Intra-day | ||||
| Matrine | 0.9986 | 105.0 ± 1.39† | 0.266 | 5.1 | 2.9 |
| Oxymatrine | 0.9996 | 103.6 ± 2.05 | 0.684 | 5.9 | 4.2 |