Catechins | Theoretical Concentration | Determined* (μg/mL) | Precision (%RSD) | Accuracy (%) | |||
(μg/mL) | |||||||
Original* | Added | Total* | Intra-day | Inter-day | Intra-day | ||
EGCG | 6.67 | 2.5 | 9.17 | 9.05 | 0.77 | 0.83 | 95.3 |
6.67 | 5.0 | 11.67 | 11.47 | 0.98 | 1.43 | 96.1 | |
6.67 | 10.0 | 16.67 | 16.12 | 0.98 | 1.97 | 94.6 | |
EGC | 7.13 | 2.5 | 9.63 | 9.56 | 0.43 | 1.48 | 97.3 |
7.13 | 5.0 | 12.13 | 12.05 | 1.01 | 1.56 | 98.5 | |
7.13 | 10.0 | 17.13 | 16.99 | 0.47 | 1.68 | 98.6 | |
EC | 1.74 | 2.5 | 4.24 | 4.29 | 0.68 | 1.96 | 101.7 |
1.74 | 5.0 | 6.74 | 6.67 | 0.67 | 1.62 | 98.6 | |
1.74 | 10.0 | 11.74 | 11.65 | 0.57 | 1.52 | 99.1 | |
ECG | 1.19 | 1.25 | 2.44 | 2.35 | 0.91 | 0.63 | 92.9 |
1.19 | 2.50 | 3.69 | 3.49 | 0.77 | 1.69 | 92.0 | |
1.19 | 5.00 | 6.19 | 5.79 | 1.19 | 2.51 | 92.1 | |
+C | 2.50 | 1.25 | 3.75 | 3.75 | 0.81 | 1.78 | 100.2 |
2.50 | 2.50 | 5.00 | 4.98 | 0.77 | 2.53 | 99.4 | |
2.50 | 5.00 | 7.50 | 7.87 | 1.03 | 2.01 | 107.5 |