|
Intra-day variability for the simultaneous determination of eight markers in Dachengqi Tang (n = 6) |
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| Marker |
Concentration (μg/ml) |
Measured concentration (μg/ml, mean (SD)) |
Accuracya (%) |
RSDb (%) |
|
|
||||
| Naringin |
25.0 |
24.87 (0.29) |
99.5 |
1.2 |
| 62.5 |
62.80 (1.26) |
100.5 |
2.0 |
|
| 156.3 |
155.53 (3.02) |
99.5 |
1.9 |
|
| Hesperidin |
69.5 |
69. 79 (1.38) |
100.4 |
2.0 |
| 173.8 |
172.14 (3.62) |
99.0 |
2.1 |
|
| 434.4 |
429.38 (4.62) |
98.8 |
1.1 |
|
| Aloe emodin |
18.3 |
18.72 (0.53) |
102.3 |
2.8 |
| 45.8 |
46.79 (1.58) |
102.2 |
3.4 |
|
| 114.4 |
112.77 (3.56) |
98.6 |
3.2 |
|
| Rhein |
17.5 |
17.81 (0.21) |
101.8 |
1.2 |
| 43.8 |
43.83 (0.69) |
100.1 |
1.6 |
|
| 109.4 |
108.86 (1.55) |
99.5 |
1.4 |
|
| Honokial |
10.5 |
10.25 (0.11) |
97.6 |
1.0 |
| 26.3 |
26.18 (0.22) |
99.5 |
0.8 |
|
| 65.6 |
66.24 (1.53) |
101.0 |
2.3 |
|
| Magnolol |
21.0 |
21.06 (0.47) |
100.3 |
2.2 |
| 52.5 |
53.10 (1. 58) |
101.1 |
3.0 |
|
| 131.3 |
131.16 (2.06) |
99.9 |
1.6 |
|
| Emodin |
11.0 |
11.39 (0.24) |
103.5 |
2.1 |
| 27.5 |
26.54 (0.71) |
96.5 |
2.7 |
|
| 68.8 |
68.50 (1.34) |
99.6 |
1.9 |
|
| Chrysophanol |
10.3 |
10.52 (0.23) |
102.1 |
2.2 |
| 25.8 |
25.57 (0.41) |
99.1 |
1.6 |
|
| 64.4 |
65.55 (1.17) |
101.8 |
1.8 |
|
|
a Accuracy (%) = mean of measured concentration/added concentration × 100 b RSD (%) (relative standard deviation) = (SD/mean) × 100 | ||||
Tang et al. Chinese Medicine 2008 3:5 doi:10.1186/1749-8546-3-5 |
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