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| Sample | Add (μg mL−1) | Mean found (μg mL−1) | Recovery (%) | RSD (%) |
|---|---|---|---|---|
| Yam | 0.50 | 0.49 ± 0.025 | 98.86 | 5.0 |
| 1.50 | 1.62 ± 0.057 | 107.97 | 3.5 | |
| 2.50 | 2.41 ± 0.096 | 96.44 | 4.0 | |
| 0.50 | 0.52 ± 0.020 | 103.7 | 3.7 | |
| Radix pseudostellariae | 1.50 | 1.60 ± 0.052 | 106.7 | 3.3 |
| 2.50 | 2.53 ± 0.029 | 101.1 | 1.1 |
