Research Article
Simultaneous Determination of Six Major Constituents of the Herbal Formula Insampaedok-san Using HPLC-PDA
Table 3
Precision and accuracy of the analytical results ().
| Compound | Fortified conc. (μg mL−1) | Intraday | Interday | Observed conc. (μg mL−1) | Precision (%) | Accuracy (%) | Observed conc. (μg mL−1) | Precision (%) | Accuracy (%) |
| | 4.00 | 4.07 | 1.63 | 101.70 | 4.07 | 0.85 | 101.73 | 1 | 10.00 | 10.05 | 1.69 | 100.46 | 9.82 | 0.22 | 98.16 | | 20.00 | 19.96 | 0.36 | 99.82 | 20.08 | 0.06 | 100.39 |
| | 2.00 | 1.98 | 0.44 | 99.10 | 2.03 | 1.13 | 101.66 | 2 | 4.00 | 3.96 | 1.14 | 99.02 | 4.10 | 2.56 | 102.39 | | 8.00 | 8.02 | 0.28 | 100.30 | 7.94 | 0.70 | 99.30 |
| | 20.00 | 19.70 | 1.22 | 98.50 | 19.21 | 0.80 | 96.04 | 3 | 50.00 | 50.21 | 0.60 | 100.42 | 50.11 | 0.23 | 100.21 | | 100.00 | 99.96 | 0.12 | 99.96 | 100.11 | 0.08 | 100.11 |
| | 3.00 | 2.94 | 1.37 | 98.12 | 2.96 | 0.55 | 98.82 | 4 | 8.00 | 8.52 | 0.28 | 106.51 | 8.42 | 0.83 | 105.27 | | 15.00 | 14.73 | 0.13 | 98.22 | 14.78 | 0.25 | 98.55 |
| | 10.00 | 10.05 | 1.70 | 100.47 | 9.76 | 0.60 | 97.63 | 5 | 35.00 | 34.64 | 1.19 | 98.97 | 34.58 | 0.52 | 98.81 | | 70.00 | 70.11 | 0.21 | 100.16 | 70.28 | 0.12 | 100.40 |
| | 6.00 | 6.34 | 0.82 | 105.67 | 6.34 | 0.84 | 105.62 | 6 | 15.00 | 14.50 | 0.20 | 96.64 | 14.44 | 0.65 | 96.29 | | 30.00 | 30.18 | 0.04 | 100.61 | 30.21 | 0.13 | 100.70 |
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