|
Inter-day variability for the simultaneous determination of eight markers in Dachengqi Tang (n = 3) |
||||
| Compounds |
Concentration (μg/ml) |
Measured concentration (μg/ml, mean (SD)) |
Accuracya (%) |
RSDb (%) |
|
|
||||
| Naringin |
25.0 |
24.83 (0.36) |
99.3 |
1.4 |
| 62.5 |
62.68 (0.97) |
100.3 |
1.5 |
|
| 156.3 |
157.72 (4.21) |
100.9 |
2.7 |
|
| Hesperidin |
69.5 |
69. 07 (2.68) |
99.4 |
3.9 |
| 173.8 |
170.49 (4.35) |
98.1 |
2.5 |
|
| 434.4 |
428.44 (2.96) |
98.7 |
0.7 |
|
| Aloe emodin |
18.3 |
18.47 (0.32) |
100.9 |
1.7 |
| 45.8 |
44.73 (0.86) |
97.7 |
1.9 |
|
| 114.4 |
113.89 (2.31) |
99.6 |
2.0 |
|
| Rhein |
17.5 |
17.78 (0.19) |
101.6 |
1.1 |
| 43.8 |
44.32 (0.94) |
101.2 |
2.1 |
|
| 109.4 |
109.06 (0.87) |
99.7 |
0.8 |
|
| Honokial |
10.5 |
10.67 (0.17) |
101.6 |
1.6 |
| 26.3 |
25.89 (0.92) |
98.4 |
3.5 |
|
| 65.6 |
67.86 (2.23) |
103.4 |
3.3 |
|
| Magnolol |
21.0 |
21.63 (0.71) |
103.0 |
3.2 |
| 52.5 |
52.60 (0.85) |
101.9 |
1.6 |
|
| 131.3 |
130.91 (2.64) |
99.7 |
2.0 |
|
| Emodin |
11.0 |
11.46 (0.40) |
104.2 |
3.5 |
| 27.5 |
27.23 (0.87) |
99.0 |
3.2 |
|
| 68.8 |
68.32 (1.46) |
99.3 |
2.1 |
|
| Chrysophanol |
10.3 |
10.65 (0.31) |
103.4 |
2.9 |
| 25.8 |
24.98 (0.44) |
96.8 |
1.8 |
|
| 64.4 |
66.24 (1.32) |
102.9 |
2.0 |
|
|
a Accuracy (%) = mean of measured concentration/nominal concentration × 100 b RSD (%) = (SD/mean) × 100 | ||||
Tang et al. Chinese Medicine 2008 3:5 doi:10.1186/1749-8546-3-5 |
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