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Recovery of CAF (medium RT) and ECG (longer RT) from studied samples (n = 3).a
| Analytes | Concentration (inj. vol. 10 μL) |
Recovery (%) | RSD (%) | ||
|---|---|---|---|---|---|
| Catechin (μg) | Spiked (μg) | Measured (μg) | |||
| CAF | 22.65 | 10 | 31.91 | 97.70 | 2.62 |
| 20 | 40.94 | 96.00 | 2.86 | ||
| 30 | 51.08 | 97.00 | 3.25 | ||
| ECG | 34.73 | 20 | 54.18 | 98.99 | 2.10 |
| 30 | 64.51 | 99.66 | 2.70 | ||
| 50 | 84.71 | 99.98 | 2.12 | ||
Chromatography conditions as in section 2.7. CAF, caffeine. ECG, (−)-epicatechin-3-gallate. RT, retention time.
