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Results of the intra-day precision studies
| Cholesterol | Hypericin | ||||
| Conc. | RSD-PA | RSD-RT | Conc. | RSD-PA | RSD-RT |
| (×10-3 M) | (×10-6 M) | ||||
| 2.6 | 1.6% | 0.9% | 0.6% | 1.5% | 1.4% |
| 5.2 | 0.9% | 1.3% | 1.3% | 1.1% | 0.3% |
| 7.8 | 1.2% | 0.7% | 2.5% | 1.6% | 1.4% |
| 10.3 | 1.7% | 0.5% | 5.0% | 1.3% | 1.1% |
| 12.9 | 1.7% | 0.6% | 10.0% | 1.1% | 0.7% |
Conc.: Concentration; PA: Peak area; RSD: Relative standard deviation; RT: Retention time.
